Example Qs

Question 1

A runner jogs at 1m/s then accelerates at a rate of 1.5 m/s^2 over a distance of 3 metres. What is the jogger’s final speed?

Answer 1

v^2 - 1^2 = 2 x 1.5 x 3 v^2 = 10 so v = 3.16m/s

Question 2

What happens to kinetic energy during braking?

Answer 2

Hearing energy is dissipated into the surroundings