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When a man stands on a turn- table stret...

When a man stands on a turn- table stretching with two equal loads in hand and rotates. Then he folds his arm. Which of the following statements is correct

A

Linear momentum is conserved

B

Kinetic energy increases

C

Angular momentum increases

D

Angular velocity increases

Text Solution

Verified by Experts

The correct Answer is:
B, D
Kinetic energy is not conserved in the given process. In fact, with the decrease in the moment of inertia, kinetic energy increases. The additional kinetic energy comes from the work done by the man to fold his hands toward himself. Angular velocity increases as moment of inertia decreases.
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