(a)[2]
Explain the meanings of gravitational potential energy and kinetic energy.
(b)
A motion sensor is used to record the velocity of a ball falling vertically towards the ground, as shown in Fig. 3.1. As the ball falls, it passes through points A and B. The ball has a mass of $1.5\,\text{kg}$.
(b(i))[3]
Use Fig. 3.2 to calculate the displacement of the ball as it falls from A to B.
(b(ii))[2]
Use Fig. 3.2 to calculate the acceleration of the ball as it moves from A to B.
(b(iii))[3]
Use Fig. 3.2 to calculate the change in kinetic energy of the ball as it falls from A to B.
(c)[2]
Show that the work done by the gravitational field on the ball in (b) as it moves from A to B is equal to the change in kinetic energy.