Question

A car being driven at 9.0 m/s collides with the back of a stationary lorry.The car slows down and stops in 0.20 seconds. The total mass of the car and driveris 1200 kg.Calculate the average force exerted by the lorry on the car during the collision.Show clearly how you work out your answer.

Answer 1

given:-

u=9m/s

v=0m/s

t=0.20m/s

m=1200kg

solution:-

f=m(v-u)/t

f=1200*0-9/.2

f=-54000N