A 16.0-m uniform ladder weighing 520 N rests against a frictionless wall. The la

Question

A 16.0-m uniform ladder weighing 520 N rests against a frictionless wall. The ladder makes a 55.0° 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 4.20 m along the ladder from the bottom.

Horizontal Force
magnitude ___

Vertical Force
magnitude ____

(b) If the ladder is just on the verge of slipping when the firefighter is 9.20 m from the bottom, what is the coefficient of static friction between ladder and ground?

Explanation / Answer

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