A Rifle of Mass 2 Kg Is Suspended by Strings

Multiple Choice

A rifle of mass 2 kg is suspended by strings. The rifle fires a bullet of mass 0.01 kg at a speed of 200 m/s. The recoil velocity of the rifle is about

A) 0.01 m/s.
B) 1 m/s.
C) 0.001 m/s.
D) 0.1 m/s.
E) none of these