Question

A bullet hits a block kept at rest on a smooth horizontal surface and gets embedded into it. Which of the following does not change?
(a) linear momentum of the block
(b) kinetic energy of the block
(c) gravitational potential energy of the block
(d) temperature of the block.

Answer 1

Explanation:

by this.one get n a lonier momentum of block

Answer 2

The block's gravitational potential energy doesn't change because the block's height doesn't change in this phase.

Explanation:

Option (c) is correct

• If a bullet enters the block that is held at rest, the block acquires that velocity by linear momentum conservation.
• Therefore the block changes kinetic energy and the linear momentum. When most of the kinetic energy that the bullet holds converts into energy of heat, the temperature changes too.
• However, the block's gravitational potential energy doesn't change because the block's height doesn't change in this phase.

To know more about gravitational potential energy, visit:

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