Question

4. A year 11 pupil with a mass of 55kg swinging back on their chair and falling off it at a speed of 0.6m/s. What is his kinetic energy?

Answer 1

Given:

• mass = 55 kg

• velocity, v = 0.6 m/s

To be calculated:

Calculate the kinetic energy?

Solution:

Kinetic energy = 1/2 mv²

= 1/2 × 55 × 0.6²

= 55/2 × 0.36

= 55 × 0.18

= 9.9 kg.m/s