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Grade 11Thermal Physics

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

Profile image of Jayant Kumar
12 Years agoGrade 11
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2 Answers

Profile image of Abhishek Kumar
11 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.
Profile image of nimo jar
8 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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