a car of mass 900 kg moves at 10 m/s. what is the breaking force required to stop the car in a time of 5 seconds?
The braking impulse, F*time, must equal the initial momentum, M V.
M V = F * 5s
F = 900*10/5 = 1800 N
M V = F * 5s
F = 900*10/5 = 1800 N