PHYSICS · Subjective · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
A car of mass 800kg travels at 15m/s, while a truck of mass 3000kg moves at 8m/s.
(a) Calculate the ratio of the car’s kinetic energy to the truck’s kinetic energy.
(b) Which vehicle possesses greater kinetic energy?
(c) Find the speed at which the car must move so that its kinetic energy equals that of the truck moving at 8m/s.