Question

A bullet moving with velocity 100m/sec penetrates through a wooden block and emerges from the block with velocity 10m/sec .if the with of block is halved what would be the velocity of bullet after emerging from the block.

Answer 1

Explanation:

v2−u2=2as0−(200)2=2a×4⇒a=5000cm/s2

Now initial velocity to travel 6 cm,

0−u2=−2×5000×6⇒u=244.9cm/s