A 20-Kg Pistol Fires a 1

Multiple Choice

A 2.0-kg pistol fires a 1.0-g bullet with a muzzle speed of 1000 m/s. The bullet then strikes a 10-kg wooden block resting on a horizontal frictionless surface. The block and the embedded bullet then slide across the surface.
-What is the speed of the "bullet + block" system immediately after the bullet is embedded in the block?

A) 0.1 m/s
B) 10 m/s
C) 1000 m/s
D) 10 000 m/s
E) zero m/s