A wooden block hangs on a string. A bullet hits and sticks in the block. What is

Question

A wooden block hangs on a string. A bullet
hits and sticks in the block.
What is conserved in the collision of the
bullet with the block?
1. neither momentum nor mechanical energy
2. only mechanical energy
3. momentum and mechanical energy
4. only momentum

After the bullet collides and sticks in the
wooden block that hangs on a string, the
block swings out from its lowest position and
reaches its highest position.
What is conserved in the motion after the
bullet has collided with the block and the
block swings up to the highest position?
1. only momentum
2. only mechanical energy
3. neither momentum nor mechanical energy
4. momentum and mechanical energy

Explanation / Answer

4) only momentum

2) only mechanical energy

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