A 16.0-m uniform ladder weighing 520 N rests against a frictionless wall. The la
ID: 2013805 • Letter: A
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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