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.

Question

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.

Quizplus · Accepted Answer

The Answer of 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.

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