Question

a car is moving speed of 72 kilometre per hour brakes are applied to stop it in 4 seconds find the retardation produce distance travelled by the before coming to rest​

Answer 1

Answer:

Initial velocity = 72kmph

= 20m per sec

Final velocity =0 ( due to brakes applied)

time = 4sec

retardation =v-u/t

=0-20/4

= -5m/sec^2