A 9 m 260-n uniform ladder rests against a smooth wall. the, Ask an Expert

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Q. A 9 m, 260-N uniform ladder rests against a smooth wall. The coefficient of static friction between the ladder and the ground is 0.5, and the ladder makes a 50° angle with the ground. How far up the ladder can an 800-N person climb before the ladder begins to slip?

Q. Two tuning forks have frequencies of 274-Hz and 291-HZ. What is the beat frequency if both tuning forks are sounded simultaneously?

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