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AP Physics. Torque and Equilibrium Practice. A uniform beam weighs 200 N and holds a 450 N object as shown in the figure below. Find the magnitudes of the forces exerted on the beam by the two supports at its ends.

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## AP Physics

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**AP Physics**Torque and Equilibrium Practice**A uniform beam weighs 200 N and holds a 450 N object as**shown in the figure below. Find the magnitudes of the forces exerted on the beam by the two supports at its ends.**Where must an 800 N object be hung on a uniform, 100 N pole**so that a girl (P) at one end supports 1/3 as much as a woman (3P) at the other end?**A uniform, 200 N board of length L has two objects hanging**from it: 300 N at L/3 from one end, and 400 N at 3L/4 from the same end. What additional single force (P) acting on the board will cause the board to be in equilibrium?**Consider the situation shown below. The uniform, 600 N beam**is hinged at P. Find the tension in the tie rope and the components of the force exerted by the hinge on the beam.**A uniform, 400 N boom is supported as shown in the figure**below. Find the tension in the tie rope and the force exerted on the boom by the pin at P.**As shown in the figure, hinges A and B hold a uniform, 400 N**door in place. The upper hinge supports the entire weight of the door. Find the forces exerted on the door at the hinges. The width of the door is h/2, where h is the distance between the hinges.**A ladder leans against a smooth wall. (By a “smooth”**wall, we mean that the wall only exerts a perpendicular force on the wall. There is no friction force.) The ladder weighs 200 N and its center of gravity is 0.4 L from the base, where L is the ladder’s length. (a) How large a friction force must exist at the base of the ladder if it is not to slip? (b) What is the necessary coefficient of friction?

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