Question

If a bullet losses 3rd of its a velocity on penetrating 1 cm in a wooden block, then how much it will penetrate more before coming to rest? ?​

Answer 1

The answer comes out to be 3.33 cm.

Answer 2

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Its velocity becomes u/2 after penetrating 3 cm in the block. We can calculate the deceleration of the body using these. Now, we can calculate the distance the body travels till it comes to rest. Therefore, the body penetrates 1 cm (4-3=1cm) more before coming to rest.