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A spring has an unstretched length of 0.31 m. A block with mass 0.23 kg is...

A spring has an unstretched length of 0.31 m. A block with mass 0.23 kg is hung at rest from the spring, and the spring becomes 0.37 m long. Next the spring is stretched to a length of 0.43 m and the block is released from rest. Air resistance is negligible. How long does it take for the block to return to where it was released?

Next the block is again positioned at rest, hanging from the spring (0.37 m long). A bullet of mass 3.0 g traveling at a speed of 193 m/s straight upward buries itself in the block, which then reaches a maximum height h above its original position. What is the speed of the block immediately after the bullet hits?

*How high does the block go after being hit by the bullet? (In other words, calculate h.)

(Please explain the third question by details)

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genius_generous answered 2 years ago
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