Recoil speed, physics problem?

Clarita

New member
A rifle with a weight of 30N fires a 5 g bullet with a speed of 300 m/s.

a.) Find the recoil speed of the rifle
b.) If a 700-N man holds the rifle firmly against his shoulder, find the recoil speed of the man and the rifle.

I need to know HOW to do this. I have the answers...the more detail the better...thank you =)
 
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