Question

a car of mass 480kg moving at a speed of 54 kmh-1 is stopped by applying brakes in 10s. Calculate the force applied by the brakes

Answer 1

Answer:

720 N

Step-by-step explanation:

u = 54 km/ph = 54 x 1000 / 3600 m/s

= 15 m/s

v = 0

t = 10 s

So, a = v - u / t

= 15 - 0 / 10

= 1.5 m/s ^2

Mass, M = 480 kg

So, Force:  F = 480 x 1.5

= 720 N