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 | |