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

Question

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perpendicular to the wall at its upper end

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downward at its upper end

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upward at its upper end

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zero at its upper end

1.	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» D. perpendicular to the wall at its upper end

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