

MCQOPTIONS
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1. |
On a ladder resisting on a smooth ground and leaning against a rough vertical wall, the force of friction acts |
A. | Towards the wall at its upper end |
B. | Away from the wall at its upper end |
C. | Upwards at its upper end |
D. | Downwards at its upper end |
Answer» D. Downwards at its upper end | |