A man standing on horizontal smooth surface (consider air is absent but gravity is present). Choose the correct statement.

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All of these

He can jump in vertical direction

He cannot move in horizontal direction

He cannot fall in forward or backward direction

answer is D.

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Detailed Solution

With out friction a body can’t move in horizontal direction.
(except conservation of momentum) → (exception case)
All options are correct

The man can fold his legs and apply vertically downward force on the ground.The reaction force of ground.The reaction force of ground on the man (Vertically upward) makes the man jump above the ground.

If the man tries to fall in forward or backward direction , his feet will slip on frictionless syrface.So this not possible.Hence Option -(4) is correct.

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