Question

A car driving at 35 m/s hits the brakes and comes to a stop after 7 seconds. What is the acceleration of the car?

Answer 1

Vi=35m/s

Vf=0

t=7seconds

a=?

a=Vf-Vi/t

a=0-35/7

a= -35/7

a= -5m/s^2

Here -ve shows declaration.