A child is standing with folded hands at the center of a platform rotating about its central axis. The kinetic energy of the system is `K`. The child now stretches his arms so that the moment of inertia of the system doubles. The kinetic energy of the system now is - VgyanHub

Question:

43.A child is standing with folded hands at the center of a platform rotating about its central axis. The kinetic energy of the system is `K`. The child now stretches his arms so that the moment of inertia of the system doubles. The kinetic energy of the system now is

Options :

a) 2K
b) K/2
c) K/4
d) 4k

Answer :

b) K/2

Answer Steps :

Solution :-

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