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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 bullet hits a block kept at rest on a smooth horizontal surface and gets embedded into it, which of the following does not change ?
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Solution
The correct option is C gravitational potential energy of the block
When the block kept at rest is hit by a bullet, the block contain certain velocity by the conservation of linear momentum. Therefore, the linear momentum and the KE will change.
As some of the KE carried by the bullet transform into heat energy,its temprature also changes, However, gravitational PE of the block doesn't change and the heighy of the block also doesn't change.
When the block kept at rest is hit by a bullet, the block contain certain velocity by the conservation of linear momentum. Therefore, the linear momentum and the KE will change.
As some of the KE carried by the bullet transform into heat energy,its temprature also changes, However, gravitational PE of the block doesn't change and the heighy of the block also doesn't change.
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