A 20-G Bullet Is Fired into a 2

Multiple Choice

A 20-g bullet is fired into a 2.0-kg block of wood placed on a horizontal surface.The bullet stops in the block.The impact moves the block (+ bullet) a distance of 5 m before it comes to rest.If the coefficient of kinetic friction between the block and surface is 0.25,calculate the speed of the block (+ bullet) system immediately after impact.

A) 20 m/s
B) 3.5 m/s
C) 25 m/s
D) 5.0 m/s
E) 2.2 m/s