1) A 300 N force is applied to a box to move it up a ramp, as shown.

How much work is done by the force when moving the box from X to Y?

2) A young child holds a ball over the edge of a balcony. The ball possesses gravitational potential energy. The ball is released, falls on to a concrete path below, and bounces back up.

Which sequence represents, in the correct order, the transformations of the gravitational potential energy after the ball is released?

3) A 4.0 kg mass is tied to a 10.0 kg mass and placed on a slope as shown in the diagram below. They are initially held at rest. The frictional force between the 4.0 kg mass and the plane of the slope is 4.0 N. When they are released, what is the kinetic energy gained by the system if the distance moved by the 10.0 kg mass is 2.0 m?

4) A horizontal force of 90 N is used to push a box across a horizontal floor. The frictional force on the box is 50 N. What is the gain in kinetic energy of the box when it is moved through a distance of 6.0 m?

5) 2017 S4 EOY P1 Q09

A machine lifted a 500 N weight to a height of 3.0 m in 2.0 s. What is the amount of energy required to lift the same weight to a height of 3.0 m in 1.0 s?