A 160 m uniform ladder weighing480 n rests against a, Physics

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A 160 m uniform ladder weighing480 n rests against a

A 16.0 m uniform ladder weighing480 N rests against a friction less wall. The ladder makes a 61.0° angle with the horizontal.

1. Discover the horizontal and vertical forces the ground exerts on the base of the ladder when an 840 N fire fighter is 4.20 m from the bottom.

2. If the ladder is now on the verge of slipping when the fire fighter is 8.90 m up, what is the coefficient of static friction among ladder and ground?

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Physics: A 160 m uniform ladder weighing480 n rests against a

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