Question

a car of mass 2400 kg moving with a velocity 20m s-1 is stopped in 10 second on appling brakes.calculate the retardation and the retarding force.

Answer 1

Retardation = u/t = 20/10 = 2m/s^2

Retarding Force = mass * Retardation = 2400 * 2 = 4800 N

Answer 2

Given,
Mass = 2400 kg
Inital velocity = 20 m/s
Time = 10 second
Retardation =?
Retarding force =?

Retardation = initial velocity/time
= 20/10
= 2 m/s^2
Retarding force = mass x retardation
= 2400 x 2
= 4800 N