A 4.20-g bullet embeds itself in a 20.0-kg block, which is attached to a horizontal spring with a force constant of 980 N/m. The maximum compression of the spring is 2.40 cm. What is the speed of the bullet just before it hits the block?
A)800 m/s
B)700 m/s
C)672 m/s
D)900 m/s
E)952 m/s

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The Answer of A 4.20-g bullet embeds itself in a 20.0-kg block, which is attached to a horizontal spring with a force constant of 980 N/m. The maximum compression of the spring is 2.40 cm. What is the speed of the bullet just before it hits the block?
A)800 m/s
B)700 m/s
C)672 m/s
D)900 m/s
E)952 m/s

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