On a ladder resting on a rough ground and leaning against a smooth vertical wall, the force of friction acts Options: A . &nbspdownwards at its upper end B . &nbspupwards at its upper end C . &nbspperpendicular to the wall at its upper end D . &nbspzero at its upper end E . &nbspnone of these.

On a

Question

On a ladder resting on a rough ground and leaning against a smooth vertical wall, the force of friction acts

Options:

A . downwards at its upper end

B . upwards at its upper end

C . perpendicular to the wall at its upper end

D . zero at its upper end

E . none of these.

Answer: Option D

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