Question

A man is standing at the centre of frictionless pond of ice. How can he get himself to the shore?

• A. By throwing his shirt in vertically upward direction
• B. By spitting horizontally
• C. He will wait for the ice to melt in pond
• D. Unable to get at the shore

Answer 1

Answer: (B)

A man must throw his shirt in the opposite direction of the desired direction of motion. By spitting horizontal he will feel an opposite force to the spitting according to Newton's third laws of motion as there is very much less friction so he can move opposite to the spitting and so this way he will able to conserve momentum in an opposite direction.