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Q. A vertical spring (spring constant = 119 N/m) is mounted on the floor. A 0.390-kg block is placed on top of the spring and pushed down to start it oscillating in simple harmonic motion. The block is not attached to the spring.

Q. A 13 g bullet traveling 219 m/s penetrates a 2.0 kg block of wood and emerges cleanly at 158 m/s. If the block is stationary on a frictionless surface when hit, how fast does it move after the bullet emerges?

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