Physics, 31.07.2019 04:10 mutoni55

A16.0-m uniform ladder weighing 480 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 3.80 m along the ladder from the bottom.
(b) if the ladder is just on the verge of slipping when the firefighter is 9.40 m from the bottom, what is the coefficient of static friction between ladder and ground?

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A16.0-m uniform ladder weighing 480 n rests against a frictionless wall. the ladder makes a 55.0° an...

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