Question

A bullet moving with 10ms-¹ hits a wooden plank. The bullet is stopped when it penetrates the plank 2cm deep. Calculate the retardation of the bullet.

Answer 1

u=10m/s

v=0

s=0.02m

a=v-u/t

=-10/0.02

=-500m/s/s

Retardation = - a

=500m/s/s