Question

a ladder is resting on a rough ground and leaning against a smooth vertical wall. the force of friction will act this question was previously asked in afcat ekt mechanical official paper 1: set 02/2016 view all afcat ekt papers > downward at its upper end upward at its upper end zero at its upper end perpendicular to the wall at its upper end

Answer 1

The force of friction will act perpendicular to the ground at its upper end.

When a ladder is resting on a rough ground and leaning against a smooth vertical wall, there will be a normal reaction on the wall and on the floor. The weight of the ladder acts in a vertically downward direction. The frictional forces act on the wall and the floor.

The frictional force between the ground and the ladder acts in a direction towards the wall as shown in the figure. The frictional force between the wall and the ladder is zero since the wall is smooth (coefficient of friction between the wall and the ladder ) is zero.

[Image of a ladder resting on a rough ground and leaning against a smooth vertical wall. The force of friction is shown acting between the ladder and the ground.]

The force of friction is given as, f = μN, where μ = coefficient of friction and N = normal reaction.

The coefficient of friction between the ladder and the ground is typically greater than zero, so the force of friction is non-zero. The force of friction acts in a direction towards the wall, so it helps to prevent the ladder from sliding away from the wall.

Step-by-step explanation: