An 80-G Bullet Is Shot into a 4

Multiple Choice

An 8.0-g bullet is shot into a 4.0-kg block,at rest on a frictionless horizontal surface (see the figure) .The bullet remains lodged in the block.The block moves into an ideal massless spring and compresses it by 8.7 cm.The spring constant of the spring is 2400 N/m.The initial velocity of the bullet is closest to

A) 1100 m/s.
B) 1200 m/s.
C) 900 m/s.
D) 1300 m/s.
E) 1000 m/s.