a bullet emerges out from a wooden plank wit 75%of its initial kinetic energy. the number of additional planks required to stop the bullet is? (ans: 3)
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Please find below the solution to the asked query:
Here, Given that the bullet emerges from the plank with 75% of its initial kinetic energy. So,
Let the thickness of the plank is t. So, the acceleration offered by the plank is,
If n number of planks are needed to stop the bullet. Then,
So, 3 additional planks are required to stop the bullet.
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