Question

a bullet is fired on a wall with a velocity of 400m/s. if the bullet stops as a depth of 0.5 m inside the wall, find the retardation produced by the wall

Answer 1

U=400m/s

V=0(finally the bullet is stopping)

S=0.5m

By applying the formula:V^2-U^2=2as

0^2-400^=2×a×(0.5)

-1600=a

So retardation=1600m/s^2