17. Exercises

Calculate the kinetic energy of a car, of mass 1200 kg, travelling at 30 ms−1.

Calculate the kinetic energy of a ball, which has mass 250 grams, and which is travelling at 9 ms−1.

A ball, of mass 0.125 kg, is thrown so that its initial speed is 12 ms−1. As the ball moves upwards its speed decreases to 4 ms−1 when it is at its maximum height.

a) Calculate the initial kinetic energy of the ball.

b) Calculate the minimum kinetic energy of the ball.

c) Calculate the potential energy of the ball at its maximum height.