An 80-G Bullet Is Suddenly Shot into a 4

question 60

Multiple Choice

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
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

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