Question

A bullet is fired by a light rifle and the other with a heavy rifle by the same force. Which rifle will cause more injury to the shoulder?

(A)Light rifle (B)heavy rifle (C)Both cause same injury (D)Enough information not available

Answer 1

both cause same injury because the momentum will always be the same

Answer 2

The force on the shoulder will be same in both cases.  The impulse is also same in both cases.

The impact may cause the same injury.