You do 152 J of work on your sister while pulling her back on a swing, whose chain 4.7 m long. You start with the swing hanging vertically and pull it until the chain makes an angle of 26° with the vertical while your sister is at rest. What is your sister's mass, assuming negligible friction? m = kg

A student, starting from rest, slides down a water slide. On the way down, a kinetic frictional force (a nonconservative force) acts on her. The student has a mass of 81 kg, and the height of the water slide is 11.8 m. If the kinetic frictional force does -5.1 × 103 J of work, how fast is the student going at the bottom of the slide?

An 800 N crate is pulled up a 4m long ramp. The high end of the ramp is elevated 2 m above the ground.  It takes 3200 J of work to pull the crate to the top of the ramp. Find the magnitude of the friction acting on the crate:  Greater than 400 N 400 N 0 N Non-zero, but less than 400 N

A curling stone has a mass of 18.0 kg. The stone begins initially at rest on a flat ice surface. It is then pushed by a curler at a constant horizontal force of magnitude 24.0 N over a distance of 4.00 m. If you were to make any friction between the stone and ice negligible - how much power is applied by the person pushing the stone at the beginning of the push, and how much is applied at the end of the push?

9. A man pushes an 80-N crate up a frictionless slope that makes an angle of 30° with the horizontal. The man was able to push it to a distance of 5.0Om along the slope with a force parallel also to the slope. However the speed of the crate decreases at a rate of 1.5 m/s?. The work being done by the man is: A. -200 J В. 61J С. 140 J D. 200 J 14. A 6.0-kg block is released from rest 80 m above the ground. When it has fallen 60 m its kinetic energy is approximately: A. 4800 J В. 3500J C. 1200 J D. 120 J

A 121-kg crate is being pushed across a horizontal floor by a force P that makes an angle of 25.5 ° below the horizontal. The coefficient of kinetic friction is 0.219. What should be the magnitude of P, so that the net work done by it and the kinetic frictional force is zero?

The overworked Amazon delivery person is driving up a steep hill with an incline of 26° when a box they forgot to secure starts sliding toward the back of the truck. The 3.5 kg box starts from rest near the drivers seat and slides 2.1 m along the floor to the rear door. The coefficient of kinetic friction between the box and the floor is 0.36. What is the work done by the weight of the box? Wmg 31.6 J What is the work done by the Normal Force? WN = 0 What is the work done by the frictional force? Wfk = 23.31 What is the net work done on the box? Wnet What is the change in kinetic energy for the box? AKE How fast is the box moving just before it hits the rear door? Vfinal = J J X J J ms

A sledge loaded with bricks has a total mass of 18.9 kg and is pulled at constant speed by a rope inclined at 19.5° above the horizontal. The sledge moves a distance of 19.8 m on a horizontal surface. The coefficient of kinetic friction between the sledge and surface is 0.500. (a) What is the tension in the rope? ___N(b) How much work is done by the rope on the sledge? ____kJ(c) What is the mechanical energy lost due to friction? ____kj

Starting from rest, a 6.6-kg block slides 3.3 m down a rough 36-degree incline. The coefficient of kinetic friction between the block and the incline is μk = 0.49.  Determine the net work done on the block.

The only force acting on a 4.1 kg canister that is moving in an xy plane has a magnitude of 2.6 N. The canister initially has a velocity of 3.5 m/s in the positive x direction, and some time later has a velocity of 7.8 m/s in the positive y direction. How much work is done on the canister by the 2.6 N force during this time? Number i Units (>)