Question

A 14.0-m uniform ladder weighing 480 N rests against a frictionless wall. The ladder makes a 57.0° angle with the horizontal.

(a) Find the horizontal and vertical forces the ground exerts on the base of the ladder when an 850-N firefighter has climbed 4.10 m along the ladder from the bottom.

what is the magnitude of the horizontal force in newtons and what is its direction?

what is the magnitude of the horizontal force in newtons and what is its direction?

what is the magnitude of the vertical force in newtons and what is its direction?

(b) If the ladder is just on the verge of slipping when the firefighter is 9.30 m from the bottom, what is the coefficient of static friction between ladder and ground?

Step 1

a)

The expression for the vertical and horizontal force,

Step 2

Substitute the values in equation (I) and (II),

Step 3

The direction of the horizontal force is towards the wall and t...

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