An 8.0-g bullet is suddenly shot into a 4.0-kg block that is at rest on a frictionless horizontal surface,as shown in the figure.The bullet remains lodged in the block.The block then moves against a spring and compresses it by 3.7 cm.The force constant (spring constant)of the spring is $2500 \mathrm {~N} / \mathrm { m }$ What was the initial speed v of the bullet?
A)460 m/s
B)440 m/s
C)480 m/s
D)500 m/s
E)520 m/s

Question

An 8.0-g bullet is suddenly shot into a 4.0-kg block that is at rest on a frictionless horizontal surface,as shown in the figure.The bullet remains lodged in the block.The block then moves against a spring and compresses it by 3.7 cm.The force constant (spring constant)of the spring is $2500 \mathrm {~N} / \mathrm { m }$ What was the initial speed v of the bullet? 
A)460 m/s 
B)440 m/s 
C)480 m/s 
D)500 m/s 
E)520 m/s

Quizplus · Accepted Answer

The Answer of An 8.0-g bullet is suddenly shot into a 4.0-kg block that is at rest on a frictionless horizontal surface,as shown in the figure.The bullet remains lodged in the block.The block then moves against a spring and compresses it by 3.7 cm.The force constant (spring constant)of the spring is $2500 \mathrm {~N} / \mathrm { m }$ What was the initial speed v of the bullet? 
A)460 m/s 
B)440 m/s 
C)480 m/s 
D)500 m/s 
E)520 m/s

An 80-G Bullet Is Suddenly Shot into a 4 2500 N/m2500 \mathrm {~N} / \mathrm { m }2500 N/m

An 80-G Bullet Is Suddenly Shot into a 4 $2500 \mathrm {~N} / \mathrm { m }$