An 8.m 220 n uniform ladder rests against a smooth wall., Ask an Expert

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Q. An 8.0 m, 220 N uniform ladder rests against a smooth wall. The coefficient of static friction between the ladder and the ground is 0.75, and the ladder makes a 50.0° angle with the ground. How far up the ladder can an 770 N person climb before the ladder begins to slip?

Q. A 37-kg girl is bouncing on a trampoline. During a certain interval after leaving the surface of the trampoline, her kinetic energy decreases to 210 J from 450 J. How high does she rise during this interval? Neglect air resistance.

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