# Tension In Two Ropes Hanging Mass Calculator

The formula for the horizontal shear is S = W / (2 tan A). One is tilted at a 30. Use the mass of the hanging weight M to calculate the tension T in the string, then use this tension and the wave velocity v to calculate the mass density „ of the string. As tension is a force, the results given through the formula are expressed in newtons and noted with the symbol N. Slings should have a minimum design factor appropriate to the type of material asspecified in the appropriate section. The point on the left at a height of 5 m [coordinates (0,5m)], and point on the right is at a height of 10 m [coordinates (10m,10m)]. (b) Find the tension in the rope above Superhero. As a result, the tension in the top and bottom portions of the rope might differ from each other. 81 m/s2) = 29. Find the upward acceleration of the smaller mass and the tension in the rope. Thus all massless ropes always experience two equal and opposite tension forces. Determine the tension in each of the ropes holding the object. The figure shows two 1. A Catalog of Forces: (4. It is important to understand that tension is a pull in a connector. Hooke's law - force, elongation and spring constant. 00-kg mass in the figure is stationary, then its acceleration is zero, and thus The only external forces acting on the mass are its weight and the tension supplied by the rope. Outdoor Swing Seat Accessory With Hanging Kit by Khomo Gear Products Infomation ☀ Web Saucer Swings On Sale ☀ Outdoor Swing Seat Accessory With Hanging Kit by Khomo Gear Explore Furniture By Room - Bedroom Furniture, Living Room Furniture, Outdoor Furniture, Dining Room Furniture, Kids' Room & Study Room Furniture. (It is attached to to each tree at the same height. What is the tension in the rope?. The tension force can be resolved into a component which acts vertically upwards, and a component which acts towards the centre of the circle. The required equations and background reading to solve these problems are given on the friction page, the equilibrium page, and Newton's second law page. The figure shows two 1. 8 m/s 2) Repeat for the second and third harmonic and fill in the table. Make sure you have enough rope to accommodate height and the knots you’ll tie. Tension Calculator In physics, a tension is used to measure an objects capacity to withstand the stress and strain. For instance, if you cannot find a particular size denim jeans at the buy near you, you can look around the buy's website and find out if they're open to be delivered to you. Find the acceleration of each object and the tension in the cable. Part B: Determine the tension force T1 in the first rope. A rope of mass $$\displaystyle m$$ hangs between two trees, making an angle $$\displaystyle \theta$$ with the vertical at each end. Vector forces can be calculated using mathematical formula. Assume that ϕ = 18 ∘. 7m/s^2 Therefore Force = 560 * 1. 50 m long with a mass of 100 kg. For a body with mass 100 kg the load in the rope can be calculated. We've got a 9kg mass hanging from a rope that rope passes over a pulley then it's connected to a 4kg mass sitting on an incline. If the buckets are at rest, what is the tension in each cord? (539 N, 49 N) If the two buckets are pulled upward with an acceleration of 1. ) Your goal in this problem will be to find the magnitude of the tension force in the rope at the ends and midpoint of the rope. Mass is related to how much stuff is there and weight is related to the pull of the Earth (or any other planet) upon that stuff. 20kg and is attached by a rope in a pulley to a weight hanging off a table that weighs 0. Features that affect the rated capacity of the sling and that shall be considered in calculating the design factor are:. Physics 204A Class Notes 13-1 Section 13 - Tension in Ropes with Pulleys Outline 1. We have two objects — a cube of 13 kg and a sphere of 39 kg. I'd like it so the user can select any two objects in a 3d space, and it'll draw a free hanging curve between them, similar to telegraph wires or fences. The mass weighs 8 N. rearranging to solve for tension:, where is tension (N), is the angle (degrees), is the mass of the ball (kg) and. So everyone should be assured that some cars run on gasoline, while others run on diesel. 0 m/s2[E]) b) calculate the magnitude of the tension in the rope (48N). The options will allow the user to change the weight (which will either increase weight or rope length to give the same effect) and possibly some other things - Peter Nov 29 '13 at 11:44. In terms of and , calculate a) the magnitude of the force ; b) the tension in the rope. The mass of the block A is 10 kg and the mass of the hanging block B is 8 kg. 8 Newtons per kilogram divided by cos 31, angle of the tangent force, plus sin 31 times tan 15, and we get 512 Newtons is the force of tension of the rope. Friction can be ignored in this problem. The options will allow the user to change the weight (which will either increase weight or rope length to give the same effect) and possibly some other things - Peter Nov 29 '13 at 11:44. How do I find out what the tension is on both ropes and what angle the bar will be at due to those tensions. The mass of sled one is 12 kg and the mass of sled 2 is 8. Having mass and density of the liquid, volume is trivial. He releases the rope when his velocity is zero. Rope B is being pulled with a force of 25N. There are two masses, one sitting on a table, attached to the second mass which is hanging down over a pulley. Such a situation is physically impossible and, consequently, a massless rope can never experience a net force. If the person has a mass of 55kg. There is another system to consider. It's like lifting the weight with two ropes instead of one. A 100kg painter paints the side of a building while standing on a 8m long board. Therefore, the tension in each will be the same. 25 m/s2 by the upper cord, calculate the tension in each cord. It includes a large range of camping knots and essential utility knots. Therefore, the rope on your side of the pulley has the greater. We know that together, the vertical components of the tension must equal the weight of the block. Friction on the blocks is negligible. A 1000 Kg Steel Beam Is Supported By Two Ropes What The Tension In Each September 22, 2018 - by Arfan - Leave a Comment Solved A 1000 Kg Steel Beam Is Supported By The Two Ropes. 00-m-long, 190-N, uniform rod at the zoo is held in a horizontal position by two ropes at its ends (\textbf{Fig. ropes as shown in the figure. hanging from a cable. Determine the. What is the tension at the top end of rope 1? A) 18 N B) 15 N C) 2. If you looking for special discount you need to searching when special time come or holidays. The tension in a string or rope must follow the rope! The tension may have to extend around corners, over and under pulleys, etc. Here is the formula:. It is independent of the block in your hand. So tension is really just the force that exists either within or applied by a string or wire. lbs of force //hidden section // end of hidden section ; Pulling Angle. com offers 107 rope dynamometer products. The size of raceway does not effect the pulling tension or the sidewall pressure. 1 Newton's 2nd law of motion. We can determine the. This in turn will relate the weight of the block to the tensions in the other two ropes. 00-kg crate with a force that gives the crate an acceleration of 3. A second rope is attached to the 5kg block and is being pulled by someone with a force of 11N. Here is a formula that we can use to calculate the amount of force that is being applied to the deviation or directional pulley anchor point when measuring from the angle of deflection. If you're guessing blindly, use a 55%/45% weight balance; however, it is much more appropriate to measure your car. Attached to the 8-kg mass is another light string, which a person uses to pull both blocks horizontally. 1 Using Newton's First Law First Law. What is the tension in each of the ropes attached to the ceiling if the hanging mass is 0. 00 kg block on a smooth tabletop is attached by a string to a hanging block of mass m2 = 2. The only external forces acting on the mass are its weight w and the tension T supplied by the rope. 3 N, pulling upward on the block. Wiki User It is a mass or object hanging from a rope, string or wire. calculate the surface tension of. What is the acceleration of each box, and the tension in the rope?. 00 kg and the other with mass 6.  You made a graph with the hanging stuff on the vertical axis, and the mass of the cart on the horizontal axis. A heavy object is lifted using two ropes and two pulleys, as shown in the diagram 2. Calculate Horizontal Distance - Lauren Clark B Determining Total Mass - Lauren Dible D. kilogram mass tied to a rope, and that rope. Tension is an important concept in both conceptual and advanced Physics. Download Citation on ResearchGate | Coupled vibrations of rope-guided hoisting system with tension difference between two guiding ropes | The flexibility of the guiding rope and the tension. Calcula tension in each rope. Asked to find the tension of a point that is halfway up a rope (where the rope has mass), given the system: The solution of the problem (FBD included) is as follows. If the tension in the rope is provided by an arrangement like the one illustrated in Figure 16. B-In terms of w and the angle theta of the incline, calculate the tension in the rope that connects block A to the wall. Find the value of m2. The point on the left at a height of 5 m [coordinates (0,5m)], and point on the right is at a height of 10 m [coordinates (10m,10m)]. Question: WICILI CUILCIJOUTUU ULICECIL Two Vertical Hanging Ropes Are Used To Make A Swing. The tension in the two ropes equals mg. The prisoner was weighed and their height measured the day before the execution and the hangman would secretly view the person to enable him to calculate the correct drop from their weight and physical appearance. 8) The roof is flat from where the 2 string hang. Reduced load capacity in ropes, cables or lines - due to angle. More detailed notes and examples are given in the class notes, presentations, and demonstrations (click here. tension calculator of two strings with different angles Tension calculator in physics to find tension in two ropes hanging with different (or same) angles and supporting an object with mass m. Though a straightforward application of Newton's second law, many find this problem deceptive. The endpoints are at the same height of y = 0 (notice that I have redefined the length of the rope to be 2L since the numbers will work out easier in the result). but without really explaining why that would be the case. (c) Find the tension in the rope between. 10 kg is hanging from a rope. ) Your goal in this problem will be to find the magnitude of the tension force in the rope at the ends and midpoint of the rope. This figure shows a single pulley with a weight on one end of the rope. ! i ⃗F i =0 has a constant velocity (which may be zero) and zero acceleration. Hanging Mass from a Horizontal Rope: Tension? A rope, assumed massless, is stretched horizontally between two supports that are 3. I often need to tension a rope between two trees, usually 20-30 ft apart. I did this and the answer is T = mg/2(sin x). They are under tension owing to the hanging block of mass M = 51 1 g. The first rope (R1) is 20 degrees to the left of the steel attach point, the second rope is 30 degrees to the right of the attach point. Assume the force of friction on the wagons in negligible. It is meant as a prep for class. 8) The roof is flat from where the 2 string hang. This prevents tension from settling at a single point, weakening that spot and increasing the risk of a break later. Feed End Tension. An execution box containing two ropes (one new and one used), a white hood, pinioning straps, etc. Combining pulleys What is the mechanical advantage of this pulley system? Combining pulleys What is the mechanical advantage of this pulley system? 4 The two lower pulleys are both connected to the mass at bottom. 81 m/sec 2. A 80kg man is hanging from two 1. Photo about Two brown and white blank paper price tags or labels set and wooden pins decorated on hearts hanging on a rope on the blue wooden background. 00s after the force is applied, block A moves 18. Blocks and springs. Spread the rope on the branch to distribute weight. In contrast, consider the phrase: "You can't push a rope. The tension depends on the horizontal and vertical distances between its ends and on the length of the chain. (a) What is the angle O when he releases the rope? (b) What is the tension in the rope just before he releases it? (c) What is the maximum tension in the rope? —5. 1 is the tension force of the rope pulling on block Bor pulling on the knot (as the case may be), T 2 is the tension force exerted by the second rope (at angle = 30 ) on the knot, f is the force of static friction exerted by the horizontal surface on block B, F N is the normal force exerted by the surface on block B, W A is the weight of block A(W. The (massless. 4 Calculate the maximum weight that force F. Using the equation: Force-tension=mass(acceleration+gravity) the force tension on the bottom rope connecting the two paint buckets would be 3(1. 5 m/s^2 what is the tension in the second string attached to the 8-kg mass?. How to Install a Hanging Porch Swing. Now, your assumption that the load can be in the center cannot be sustained since the left horizontal rope would remain slack at all times; however, if you put the mass offset as the force diagram shows, it will work and further your assumption of ignoring the stretch in the vertical cable is a good one since the elasticity of the. Calculate the gravitational force pulling the mass down as F=mg = m x 9. Nellie has a mass of m (units: kilograms). 1 Answer to Two ropes are connected to a steel cable that supports a hanging weight as shown in Fig. 00 \times 10^{-5} \textrm{ kg}$hangs motionless on it. The forces acting on m 2 (the 5 kg block) are tension T in the negative x direction, friction f in the positive x direction, a normal force N in the positive y direction, and weight in the negative y direction. Mass and Weight - the Gravity Force. 1) There is a 5 kg mass hanging from a rope. 8 Newtons (2dp)). 0 kg, and the mass of the rope is negligible. How To Find Tension In A Rope With Mass And Length. 00 kg rests on a frictionless horizontal table and is connected to a cable that passes over a pulley and is then fastened to a hanging object with mass m 2 = 10. Belt tension reduces over time. The angled ropes are more likely to break than the vertical ropes. 00 kg and the other with mass 6. This would produce a tension, T, equal to the weight of the hanging mass, Mg, where "g" represents the acceleration due to gravity, 9. The net force on m 2 will be non. On the coordinate system provided, sketch a freebody diagram representing all of the forces in each situation. 1 kg and the hanging mass is 2. and string #2 has a linear mass density of4. This system is useful because it relates the weight of the block to the tension in the rope. One rope is. Two items to note about this solution: T y is used as the force because it is the component perpendicular to the moment arm. Find T, the tension in the connecting rope, and the acceleration of the blocks. (a) Draw a free-body diagram showing all of the forces acting at the knot that connects the two ropes to the steel cable. Example I Example II. How To Find Tension In A Rope With Mass And Length. These diagrams represent two examples of signs hanging from identical ropes. Bend Radius. The weight of the beam exceeds the tension. I am not skilled with knots so it is often sloppy and the tension doesn't hold even very modest weight (such as clothes or something like a target hanging). I chose to orient my diagram so that the movement of each mass will be in a negative direction, assuming we agree to use the. Tension in a rope with hanging masses Mass on a rope between two walls Work & Energy of a hanging rope The tension in the rope as the hanging block accelerates. Ignore air resistance and the mass and elasticity of the rope. (c) How can we measure, electronically,em the stress/tension on the string?. 0 kg F a m = = =. Find the magnitude of the acceleration with which the bucket and the block are moving and the magnitude of the tension force T by which the rope is stressed. 0 m 10 b) n Rd Ïs zcacJcu. Engineering Calculators Menu Engineering Analysis Menu. A beam AB has weight W newtons and length 4 m. Calculate the tension T in the rope if the gymnast climbs the rope at a constant rate. We figure out the tension in the wire connecting the two masses. k B 8 (a) Find the tension in the string. • The rope is assumed to be massless (light) and unstretchable. Each rope makes an angle of 60o with the ceiling. Two kinds of stretch occur in cable based on wire rope: constructional stretch and elastic stretch. 00 kg) are tied together by a rope and hang from a pulley as shown. each case is the tension in the rope to the left of that block (A, C, and F), and this tension must therefore be the mass of that block times the acceleration, ma. What is the tension in the rope attached to the 1. Apply Newton's third law. Here is a formula that we can use to calculate the amount of force that is being applied to the deviation or directional pulley anchor point when measuring from the angle of deflection. Tension in a rope with hanging masses Mass on a rope between two walls Work & Energy of a hanging rope The tension in the rope as the hanging block accelerates. For example imagine if instead of 18kg, the block in your hand was 180kg. 00 kg rests on a frictionless horizontal table and is connected to a cable that passes over a pulley and is then fastened to a hanging object with mass m 2 = 10. String mass data was gathered by Graham McDonald using equipment at the Powerhouse Museum in Sydney. Drag Force. ropes make angles of 60 degrees with horizontal. Include the correct sign based on the convention for torque. ? The answer given is 250 N, but I have no clue as to how to calculate this. On the first swing, the person lets go of the rope when first arriving at point C. The figure below shows the block after it has been pushed while it is still moving to the right. Enter the measured value for the hanging mass. Take a look at the figure, in which a rope goes over a pulley and down to a mass m. Calculate the tension on both sides of the pulley system using a calculator to solve the following equations: T(1) = M(1) x A(1) and T(2) = M(2) x A(2). A) Determine the tension in both parts of the rope. Tension in the rope must equal the weight of the supported mass, as we can prove using Newton's second law. Two kinds of stretch occur in cable based on wire rope: constructional stretch and elastic stretch. The calculator is implemented so you can bookmark and email results. A force always has a very definite direction - up, to the left, North, etc. Find T 1, the tension in the upper rope. You will know how to calculate sag and sag formula. I'd like it so the user can select any two objects in a 3d space, and it'll draw a free hanging curve between them, similar to telegraph wires or fences. This would produce a tension, T, equal to the weight of the hanging mass, Mg, where "g" represents the acceleration due to gravity, 9. We can use the "F=ma" formula to calculate the static force on a rope by multiplying the mass of the object by 9. We provide it as a resource for our customers, because the weight of a bolt or assembly is often needed when calculating shipping costs, or jobsite delivery requirements. Using the equation: Force-tension=mass(acceleration+gravity) the force tension on the bottom rope connecting the two paint buckets would be 3(1. A block of mass 2. 00 kg, sit on the frictionless surface of a frozen pond, connected by a light rope. The whole system has an acceleration of a = 2. 300, an acceleration of magnitude a = 0. If mass m 1 and mass m 2 are reversed, we will still obtain the same acceleration, but the tension in the rod will be negative (which means that the rod is being compressed). The coefficient of static friction is 0. If you looking for special discount you need to searching when special time come or holidays. Find the force exerted by a rope on a 10-kg mass that is hanging from the rope you calculate pull on weight hanging on 2 ropes? to define two of the three variables of force, mass, and. Photo about Blank paper notes hanging on rope with clothes pins, copy space for text or image or product placement. edit: damn, I messed up the title. When a string, fixed at both ends, is given a vertical hit by a stick, a dent appears in it that travels along the string. A 400 N object is hanging from two ropes that are suspended from the ceiling. In the case of a man. The boot is held suspended by the ropes and does not touch the bed. Then the Case II, the mass is hanging on a rope as i said. All of our spools of rope are cut to order. What is the angle$\theta$if the tension in rope 1 is$1. Measure the radius of a clear tube, then place the tube in the water and measure how high the water in the tube rises above the water in the container. com offers 107 rope dynamometer products. HOISTING J3010/3/2 INPUT 3. An online Force calculator to compute Force based on Mass and Acceleration. Image of hanging, hang, decor - 103312683. The tension in the string can thus be adjusted by hanging more or less mass from it. We are pulling it up with 30N. The traffic light does not move, so the net force must be zero. The figure below shows Superhero hanging motionless from a rope, with Trusty Sidekick hanging below him. This figure shows a single pulley with a weight on one end of the rope. (a) What is the magnitude of the block’s acceleration? (b) The force magnitude F is slowly increased. Because all rotational motions have an axis of rotation, a torque must be defined about a rotational axis. 6 m/s$^2$ Hint. Two ropes are connected to a steel cable that supports a hanging weight of 150 N. The free-body diagram is given in Figure 4. About this Calculator What is it for? This calculator can be used as an aid to help estimate the weight of bolts, nuts, and washers. The mass of the block on the table is 4. Assume that no friction acts on the sleds. 3 kg, and the mass of wagon 2 is 5. A person is hanging from two ropes, as shown in the figure. It is attached by a rope over a pulley to a mass of kg which hangs vertically. Photo about Two Blank paper notes hanging on rope with clothes pins, copy space for your text or image or product placement. The maximum force in the rope in the figure above can be estimated by firs calculate the angles: α = tan-1 (3. kilogram mass tied to a rope, and that rope. For instance, when a rope is attached on an iron bar at one end and a is pulled by a vehicle on the other end of the rope. M2, which has a mass of 20 kg, rests on a long ramp of angle θ equal to 30°. The formula for rope tension is T = W / (2 sin A), where T is the tension, W is the weight of the person plus gear, and A is the angle. Force or tension exerted is calculated by providing the mass and acceleration of the rope. Calculate the total rotational kinetic energy of the two hands about the axis of rotation. A crate is hanging from a rope which is attached to a metal ring through which a second rope runs, as shown to the right. A mass of 108 g is hanging from two massless ropes attached to the ceiling. "In physics, tension describes the pulling force exerted by each end of a string, cable, chain, or similar one-dimensional continuous object, or by each end of a rod, truss member, or similar three-dimensional object. An essential tourist link point along with a significant administrative and trading middle, it is also gaining importance being an important educational centre. Two items to note about this solution: T y is used as the force because it is the component perpendicular to the moment arm. A woman wearing golf shoes (so she can get traction on the ice) pulls horizontally on the 6. A torque is a force applied to a point on an object about the axis of rotation. To create this article, 60 people, some anonymous, worked to edit and improve it over time. So tension is really just the force that exists either within or applied by a string or wire. This would produce a tension, T, equal to the weight of the hanging mass, Mg, where "g" represents the acceleration due to gravity, 9. Horizontal Component Vertical Component The weight of the mass is 36N Weight on a Wire A rope extends between two poles. One requires a bit of inspiration in 'seeing' the answer, and the other involves a methodical trudge through a little mechanics and calculus. What is the meaning of the slope of this graph?. Photo about Two brown and white blank paper price tags or labels set and wooden pins decorated on hearts hanging on a rope on the blue wooden background. Outdoor Swing Seat Accessory With Hanging Kit by Khomo Gear Products Infomation ☀ Web Saucer Swings On Sale ☀ Outdoor Swing Seat Accessory With Hanging Kit by Khomo Gear Explore Furniture By Room - Bedroom Furniture, Living Room Furniture, Outdoor Furniture, Dining Room Furniture, Kids' Room & Study Room Furniture. Now let the 'mg' of the mass acting downward be 20N. The weight of the material is also important - partly as a lead climber has the weight of the rope hanging below them, but also because climbing gear is often carried for large distances. What is the tension in the rope if the acceleration of the mass is zero? Answer: The mass, m = 5 kg; the acceleration, a = 0; and g is. Calculate the gravitational force pulling the mass down as F=mg = m x 9. How do you calculate the tension in two strings tied to a hanging mass? I'm looking for a conceptual understanding, not a technical understanding. (a) Find the acceleration of the system. 3)Calculate the tension in the rope if the gymnast climbs up the rope with an upward acceleration of magnitude 1. Like normal force, tension is a resultant force, meaning there is not a specific formula to calculate it. What is the tension in the rope attached to the 1. Problem: I have used two sources for calculating the deflection of this 7x7 wire rope and the values differ considerably. Calculate the torque generated by the 800. 1 Answer to Problem 1: A 67 kg person is being pulled away from a burning building as shown in the figure. Problem: Two hanging objects connected by a rope. After completing this module, you should be able to: State the two important properties of the tension forces exerted by a segment of a massless rope. The rounded hanging planters have a galvanized metal finish with faux brass sauder and hang from a rope. 9°, and angle θ2=33. 42kg is accelerated across a rough surface by a rope passing over a pulley. Raceway Pulling Tension Calculator by Gerald Newton January 17, 2000 The Calculator uses Equations based on a study by the ICEA. Combine two rubber bands in a chain (end to end) and hang a 200 mg mass from the combination. Common Exam 1, Phys 106, Summer 2010, Name:_____ _____ ____ 8. (Figure 1) Part A Determine the amount of tension in the rope by using Newton's laws to analyze the hanging mass. This force acts at the centre of mass of the rod, which is situated at the rod's midpoint. Moment is the force attempting to produce motion around an axis. hanging steel bar with weight 900kg,two ropes holding it one at 20 degrees,one at 30 degrees,tension? A physics problem regarding a rope with mass M, attached to two poles. The weight of the sign is 35 N, what are the tensions in the 2 wires. Tension) Tension Force A string or rope exerts a contact force on an object when it pulls on it. The tension in the ropes is affected both by the mass of the hanging weight and by the angle at which each rope meets the ceiling. The two blocks attached by a mass less rope that is strung over a frictionless and mass less pulley. v = ‚f: (5) 3. hanging mass, we find ∑ (1) F T is the force of tension in the string, m h is the mass of the hanger and paperclips, g is the acceleration due to gravity, and a is the acceleration of the hanger. acceleration of the hanging mass. The mass of the system is 23. The system is released from rest. kilogram mass tied to a rope, and that rope. tension calculator of two strings with different angles Tension calculator in physics to find tension in two ropes hanging with different (or same) angles and supporting an object with mass m. 09kg and the smaller block has a mass of 4. Problem: Two masses on a pulley. calculate all these topic questions correctly. The mass experiences two forces: the weight of the bob (directed vertically downward) and the tension (which acts along the string). In terms of and , calculate a) the magnitude of the force ; b) the tension in the rope. The block is subject to two forces, a downward force due to gravity, and an upward force due to the tension of the string. An essential tourist link point along with a significant administrative and trading middle, it is also gaining importance being an important educational centre. So regardless of the length of the rope, the amount of 'tug' is the same - namely, it is the magnitude of the force resulting from the weight sitting at one end of the rope. When they are released from rest, the higher block falls while the lower block rises. 2 What is the tension in the rope? So the question is simple I believe but I can't understand the concept of tension in the rope (red line). The fact-checkers, whose work is more and more important for those who prefer facts over lies, police the line between fact and falsehood on a day-to-day basis, and do a great job. Today, my small contribution is to pass along a very good overview that reflects on one of Trump’s favorite overarching falsehoods. Namely: Trump describes an America in which everything was going down the tubes under  Obama, which is why we needed Trump to make America great again. 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(Backup for that is contained in the Post piece I linked to above.) Barack Obama inherited that mess of falling numbers, which continued during his first year in office, 2009, as he put in place policies designed to turn it around. By 2010, Obama’s second year, pretty much all of the negative numbers had turned positive. By the time Obama was up for reelection in 2012, all of them were headed in the right direction, which is certainly among the reasons voters gave him a second term by a solid (not landslide) margin. Basically, all of those good numbers continued throughout the second Obama term. The U.S. GDP, probably the single best measure of how the economy is doing, grew by 2.9 percent in 2015, which was Obama’s seventh year in office and was the best GDP growth number since before the crash of the late Bush years. GDP growth slowed to 1.6 percent in 2016, which may have been among the indicators that supported Trump’s campaign-year argument that everything was going to hell and only he could fix it. During the first year of Trump, GDP growth grew to 2.4 percent, which is decent but not great and anyway, a reasonable person would acknowledge that — to the degree that economic performance is to the credit or blame of the president — the performance in the first year of a new president is a mixture of the old and new policies. In Trump’s second year, 2018, the GDP grew 2.9 percent, equaling Obama’s best year, and so far in 2019, the growth rate has fallen to 2.1 percent, a mediocre number and a decline for which Trump presumably accepts no responsibility and blames either Nancy Pelosi, Ilhan Omar or, if he can swing it, Barack Obama. I suppose it’s natural for a president to want to take credit for everything good that happens on his (or someday her) watch, but not the blame for anything bad. Trump is more blatant about this than most. If we judge by his bad but remarkably steady approval ratings (today, according to the average maintained by 538.com, it’s 41.9 approval/ 53.7 disapproval) the pretty-good economy is not winning him new supporters, nor is his constant exaggeration of his accomplishments costing him many old ones). I already offered it above, but the full Washington Post workup of these numbers, and commentary/explanation by economics correspondent Heather Long, are here. On a related matter, if you care about what used to be called fiscal conservatism, which is the belief that federal debt and deficit matter, here’s a New York Times analysis, based on Congressional Budget Office data, suggesting that the annual budget deficit (that’s the amount the government borrows every year reflecting that amount by which federal spending exceeds revenues) which fell steadily during the Obama years, from a peak of $1.4 trillion at the beginning of the Obama administration, to$585 billion in 2016 (Obama’s last year in office), will be back up to $960 billion this fiscal year, and back over$1 trillion in 2020. (Here’s the New York Times piece detailing those numbers.) Trump is currently floating various tax cuts for the rich and the poor that will presumably worsen those projections, if passed. As the Times piece reported: