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gibson72

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for example

1.An 8.0m, 200-N uniform ladder rests against a smooth wall. The coefficient of static friction is 0.60 and the ladder makes a 50 degree angle with the ground. how far up the can an 800-N person climb before the ladder begins to slip?

for this problem I drew a free body diagram and I new were to place the different forces on it. I just do not know how to handle the information given to me as well as properly utilize it.

Also I understand how to do problems were sum of torque is in equilibrium such as a hanging sign or a lamp. I am having problems in general with problems that involve ladders at an angle against a wall with different forces, such as a person, on them.