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A bullent of mass 20g enters into a fixed wooden block with a speed of 40m/s and stops in it.Find the change in internal energy during the process

A bullent of mass 20g enters into a fixed wooden block with a speed of 40m/s and stops in it.Find the change in internal energy during the process

Grade:11

2 Answers

Abhishek Kumar
askIITians Faculty 253 Points
6 years ago
Change in internal energy = 0
AS internal energy only consists of unordered motion not ordered motion of the body, which it will get when bullet enters and block starts to move.
nimo jar
11 Points
3 years ago
u = 40 m/s
v = 0 m/s
Change in internal energy = Change in kinetic energy = |KEfinal – KEinitial |
= | 0 – ½ * 0.02 * 402 |
= 16 J

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