A child is standing with folded hands at the centre of a platform rotating about its central axis. The K.E. of the system is K. The child now stretches his arms so that M.I. of the system doubles. The K.E.Of the system now is

A child is standing with folded hands at the centre of a platform rota

1.	A child is standing with folded hands at the centre of a platform rotating about its central axis. The K.E. of the system is K. The child now stretches his arms so that M.I. of the system doubles. The K.E.Of the system now is
Answer» 2K K/2 4K K/4 Answer :B