Ive been coming acrosse problems in this subject that I am not sure how to do. 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. Im having problems in general with problems that involve ladders at an angle against a wall with different forces, such as a person, on them.