Question

A car is running at a speed of 72km/h. The driver applied brakes and the car comes to rest ib 10 second. What is the average acc.

Answer 1

u=72km/hr

u=(72*5/18)m/s

u=20m/s

v=0m/s

t=10s

a=v-u/t

a=(0-20/10)m/s^2

a=(-20/10)m/s^2

a=-2m/s^2