Question

75. A Child is standing with folded hands at the centre of
a platform rotating about its central axes. The K.E of
the system is 'K'. The child now stretches his hands
so that the moment of inertia of the system doubles.
The K.E of the system now is
1) 2K
2) 7
3) 7
4 4K​

Answer 1

Answer:

2k is the answer of the question.