A Rifle of Mass M Is Initially at Rest but Free

question 52

Multiple Choice

A rifle of mass M is initially at rest but free to recoil.It fires a bullet of mass m and velocity v (relative to the ground) .After firing, the velocity of the rifle (relative to the ground) is:

• A)-mv
• B)-Mv/m
• C)-mv/M
• D)-v
• E)mv/M