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

towards the wall at its upper end

away from the wall at its upper end

On a ladder resisting on a smooth ground and leaning against a rough v

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