Question

a car of mass 4 kg moving at a speed of 540 kilometre per hour is stopped by applying brakes in 10 second calculate the force applied by the brakes​

Answer 1

initial speed is 540kmph = 150m/s

final speed is 0

acceleration = (0-150)/10

= -15m/s^2

force =(4 ×-15) = -60N