A 100kg car is traveling at 36km/h by the application of break it is brought to rest in 10m find the average force
The average force is equal to the change in momentum divided by the time taken. The change in momentum is equal to the mass of the car multiplied by the change in velocity. The change in velocity is equal to the initial velocity (36 km/h) minus 0 km/h.
Change in momentum = 100 kg x (36 km/h - 0 km/h)
Change in momentum = 3600 kg km/h
Average force = Change in momentum / Time taken
Average force = 3600 kg km/h / 10m
Average force = 360,000 N