A long ladder weighing rests with its upper end against a smooth wall and its lower…
PHYSICS · Subjective · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
A 4m long ladder weighing 25kg rests with its upper end against a smooth wall and its lower end on rough ground. What should be the minimum coefficient of friction between the ground and the ladder for it to be inclined at 60∘ with the horizontal without slipping? Take g=10m/s2.