question_answer

A bullet of mass m and horizontal velocity V hits a block of wood M resting on a smooth horizontal plane. The fraction of the bullets energy dissipated in the collision itself is :

A) \[\frac{M}{m+M}\]

B)        \[\frac{m}{m+M}\]        

C)        \[\frac{Mm}{m-M}\]     

D)        \[\frac{mV}{m+M}\]