A Bullet of Mass M and Velocity Strikes and Becomes

Multiple Choice

A bullet of mass m and velocity strikes and becomes imbedded in a wooden block of mass M, which is initially at rest on a frictionless surface. The ratio of the velocity of the system after collision to the initial velocity of the bullet is

A) M + m) /m.
B) M + m) /M.
C) M/m + M) .
D) m/m + M) .
E) M/m - M) .