An 80-G Bullet Is Suddenly Shot into a 4 $1400 \mathrm {~N} / \mathrm { m }$

question 194

Multiple Choice

An 8.0-g bullet is suddenly shot into a 4.0-kg block, 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 8.9 cm. The force constant (spring constant) of the spring is $1400 \mathrm {~N} / \mathrm { m }$ What is the magnitude of the impulse on the block (including the bullet inside) due to the spring during the entire time interval during which the block compresses the spring?

• A)13 N ? s
• B)12 N ? s
• C)10 N ? s
• D)8.3 N ? s
• E)6.7 N ? s

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