Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. A man standing on a platform holds weights in his outstretched arms. The system rotates freely about a central vertical axis. If he now draws the weights inwards close to his body, then choose the incorrect statement.

System of Particles and Rotational Motion

Solution:

When a man standing on a rotating platform holds weights in his outstretched arms, draws the weights inwards close to his body, then angular velocity increases. According to law of conservation of angular momentum, $L=I \omega=$ constant, therefore when angular velocity increases, then moment of inertia of the system will decrease, so that $L$ remains constant.
Thus, statement given in option is incorrect, rest are correct.