Question

3 A man is driving at 20m/s. He applies brakes and the car stops in 4 second
What is retardation?​

Answer 1

Explanation:

initial velocity(v)=20m/s

final velocity(u)=0m/s

time taken (t)=4second

now

retardation(-a)=v-u/t

=20-0/4

=20/4

=5

retardation(-a)=5