Question

4 A bullet of mass 20 gram is fired
with a muzzle velocity of 200 m/s
from a gun of mass 20 kg. The
velocity of gun (recoil velocity)
O
a) 2 m/s
b) 0.2 m/s
ООО
c) 20m/s
O d)0.02 m/s​

Answer 1

Answer:

0.2m/s

Explanation:

By the law of conservation of momentum, Initial momentum = find momentum

..P₁ = P₂

here, m₁ = 20 gm.v₁ = 200 ms -¹, m₂ = 20kg = 20,000 gm

m2 .*. V₂ =

= 20 x 200/20,000

= V₂ = 0.2 m/s