Question

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

• A. towards the wall at its upper end
• B. away from the wall at its upper end
• C. downward at its upper end
• D. upward at its upper end

Answer 1

Answer:

D. upward at its upper end

When a ladder leans against a rough vertical wall on a smooth ground, the force of friction will act upwards at its upper end. The lower end of the ladder moves horizontally due to gravity, but there is no friction on the smooth surface. The rough wall opposes the ladder's downward motion, creating an upward frictional force.