Question

2 identical bullets are fired one by a light rifle and another by a heavy rifle. with the same force. which rifle will hurt the shoulder more and why

Answer 1

Heavier because it will cause more momentum.

Answer 2

Let mass of light rifle be L and mass of heavy rifle be H.

then,

By using,
Law of conservation of momentum,

m1u1 + m2u2 = m1v1 + m2v2
0 + 0 = m1v1 + F
-L*v = F
(L*v1 = -F) _____ (1)

Now,
m1u1 + m2u2 = m1v1 + m2v2
0 + 0 = H*v + F
-H*v = F
(H*v2 = -F) _____ (2)

By equalising both equation,
we see that,

L*v1 = H*v2

that means,
They both will cause equal amount of injury to the shoulder.

PLZ MARK IT AS A BRAINLIEST ANSWER AND DROP A ♥.