The figure below shows the work performed on a box by a constant horizontal force as a function of the x position. Ws=10 J. (a) What is the magnitude of the force? With a kinetic energy of 2 J moving in positive x, what is the kinetic energy of the box for a displacement of 1 m?
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The figure below shows the work performed on a box by a constant horizontal force as a function of the x position. Ws=10 J. (a) What is the magnitude of the force? With a kinetic energy of 2 J moving in positive x, what is the kinetic energy of the box for a displacement of 1 m?
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- A block of mass m = 3.1 kg is placed on a rough incline surface making an angle e = 13.5. with horizontal. A force F parallel to the ground is applied to the block. Due to the applied force the block moved x = 1.2 meter along the inclined surface with constant speed. If the inclined surface has kinetic friction coeficient µk = 0.29 what is the work done by the applied force? Provide your answer with 2 decimal places. Take g = 9.81 m/s² mA horizontal force F pulls a 20-kg carton across the floor at constant speed. If the coefficient of sliding friction between carton and floor is 0.60, how much work does F do in moving the carton 3.0 m?A factory worker moves a 20.0 kg crate a distance of 4.40 m along a level floor at constant velocity by pushing horizontally on it. The coefficient of kinetic friction between the crate and the floor is 0.200. Part A: What magnitude of force must the worker apply? Part B: How much work is done on the crate by the worker's push? Part C: How much work is done on the crate by friction? Part D: How much work is done by the normal force and by the gravity? Part E: What is the net work done on the crate?
- The figure below depicts a roller coaster track. The roller coaster car has a mass of 155 kg, and the heights of the two hills are h1 = %3D 26.3 m and h2 = 15.3 m. At point A, the roller coaster car has a speed of 7.89 m/s. What is the total mechanical energy (in Joules) at point B? Friction and air resistance can be neglected. A h1 В Roller CoasterStarting from rest, a 1.7x104 kg flea springs straight upward. While the flea is pushing off from the ground, the ground exerts an average upward force of 0.35 N on it. This force does 2.7x10-4 J of work on the flea. (a) What is the flea's speed when it leaves the ground? (b) How far upward does the flea move while it is pushing off? Ignore both air resistance and the flea's weight. (a) Number i (b) Number i Units UnitsA puck with a mass of 159.0 g is sliding with an initial velocity 31.0 m/s. The puck enters a section of rough ice and slows to a speed of 15.1 m/s. What is the magnitude of the work done on the puck by the rough ice? Express your answer in Joules to 1 decimal place.
- A 1300kg truck travels up a 17.5m high hill. The nonconservative forces of friction and the force generated by the engine do work on the truck. If the work done by friction is -3.10x105j and the work done by the engine is 6.40x105j, determine the change in the trucks kinetic energy as it travels from the bottom to the top of the hill.A 22kg crate is at rest on a ramp with an incline of 25 degrees. There is a coefficient of kinetic friction between the ramp and crate of 0.29. A force is applied to pull the crate up the incline at a constant speed. What is the work done by this force to pull the crate a distance L=2.45m up the ramp?You have two vectors: A = 7.27î + 3ĵ and B = 4î - 0.95ĵ + 12k. If vector A represents a force vector and vector B is a displacement vector, what is the magnitude of work done by this force?
- A block of mass ?=0.350kg is released from rest, from a curved ramp of height h= 42.0 cm (point A in the figure). The block slides down frictionless to the bottom of the ramp to point B. a) What is work done by gravity when the block moves from A to B? b) What is the speed of the block at the bottom of the ramps (point B in the figure)? c) The box continuesto slide frictionless and compress a spring a distance Δ?=8.20cm until it stops at point C. What is the spring constant k of the spring? d)What is the elastic potential energy stored in the spring when the block is at point C?A single conservative force acts on the a 5.0 kg object. The equation Fx = 2x + 4 describes the force, where x is in meters. As the object moves along the x axis from x = 1.0 m to x = 5.0 m calculate the work done by this force.A father pulls his young daughter on a sled with a constant velocity on a level surface through a distance of 10 meters. If the total mass of the sled and girl is 35 kg and the coefficient of friction between the sled runners and the snow is 0.2, how much work does the father do?