JEE Main Physics question

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

(A)By throwing his shirt vertically upward
(B)By spitting horizontallyCorrect
(C)He will wait for the ice to melt in the pond
(D)Unable to get to the shore

Answer: (B)

Solution

By spitting (or throwing an object) horizontally, the man imparts momentum in one direction to the expelled mass; by conservation of momentum, he himself recoils in the opposite horizontal

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Question ID VK-153169