Question

A bullet hits a wall with a velocity of 20 m/sec and panetrates it up to a
distance of 5 cm. Find the decceleration of the bullet in the wall.​

Answer 1

Answer:

u = 20m/s

v = 0

s = 5cm = 0.05m

from 3rd equation

v² - u² = 2as

= 0 - (20)² = 2×0.05×a

= 0.1 a = - 400

= a = - 4000 m/s²

declaration will be - 4000m/s²