A child of mass M is sitting on a circular platform of mass 5M which is rotating counterclockwise without friction. Which of the following actions could the child do to increase the angular momentum of the child-platform system?
A. Move towards the center of the platform
B. Move towards the edge of the platform
C. Walk in a concentric circle, in a clockwise direction
D. None of these options will increase the angular momentum of the system
Answer:A
A child of mass M is sitting on a circular platform of mass 5M which is rotating counterclockwise without friction. Which of the following actions could the child do to increase the angular momentum of the child-platform system?
A. Move towards the center of the platform B. Move towards the edge of the platform C. Walk in a concentric circle, in a clockwise direction D. None of these options will increase the angular momentum of the system