A ladder is resting on a rough ground and leaning against a smooth vertical wall. The force of friction will act

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Question: A ladder is resting on a rough ground and leaning against a smooth vertical wall. The force of friction will act
[A].

downward at its upper end

[B].

upward at its upper end

[C].

zero at its upper end

[D].

perpendicular to the wall at its upper end

Answer: Option C

Explanation:

No answer description available for this question.