A spring workout can be modeled by Hooke's law F = kx where k is force constant. When the spring is fully stretched, its length is increased from 0.6m to 1.1 m and the force applied is 600 N. How much is the work done by your pull?

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?

A 10 kg barbell is rolling down a hill. There is no friction or air resistance acting on it, only the force of gravity. If it starts out moving 2 ms1, and ends up moving 7 ms1, then how much work does gravity do on it?

A 287-kg crate is being pushed across a horizontal floor by a force P that makes an angle of 17.1 ° below the horizontal. The coefficient of kinetic friction is 0.253. What should be the magnitude of P, so that the net work done by it and the kinetic frictional force is zero? Number M. Units

In the arrangement of the first figure, we gradually pull the block from x = 0 to x = +3.0 cm, where it is stationary. The second figure gives the work that our force does on the block. The scale of the figure's vertical axis is set by Ws = 1.0 J. We then pull the block out to x = +6.0 cm and release it from rest. How much work does the spring do on the block when the block moves from xi = +6.0 cm to (a) x = +4.0 cm, (b) x = -1.0 cm, and (c) x = -6.0 cm?

We know that the work (W) done by a force vector F applied to an object over a displacement ?x is given byW = F(cos?) ?x,where F is the magnitude of the force, and ? is the angle between the applied force and the direction of the displacement. This expression assumes that the force is constant over the displacement ?x. If F is not constant, it can be shown that the work done is equal to the area under the curve force versus position.Based on what above said, calculate the work done by the force versus position represented in each graph (a), (b), and (c) in the figure below.

A figure skater slides to a stop by pushing her blades against the ice as shown. The ice exerts a constant force of 200 N on the skater, and the skater stops at 0.6 m. The angle between the force and the skater's direction of motion is 140°. What is the work done on the skater by the ice?

A mother pulls her child on a sled across a rough patch of snow. The sled and child have a combined mass of 25kg. The sled’s tow rope is at 42° angle above the horizontal and the mother exerts a force of 65N. How much work has the mother done on the sled if she moves it 15m forward?

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A 12.0 kg box is given an initial push that starts it sliding across the floor. It eventually comes to a stop. If the box has an initial velocity of 3.5 m/s, how much work is done by friction to cause it to come to a stop? (Yes, you are correct, you do not know the coefficient of friction.)