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Introductory Physics Homework Help
Torque on Pulley sitting on moving belt
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[QUOTE="cp51, post: 2862688, member: 117891"] [h2]Homework Statement [/h2] There is a Pulley (or just a wheel) sitting on a moving belt being pulled with force F[SUB]a[/SUB] with some unknown friction between the pulley and the belt. The pulley rotates without slipping on the belt. Draw a freebody diagram of the pulley and the belt. [h2]Homework Equations[/h2] [h2]The Attempt at a Solution[/h2] So I feel bad asking this question because it is so basic, but for some reason I am just stuck between two possibilities. so for the belt my free body diagram looks like: Friction to the left, the applied force to the right, and the weight of the belt down and normal force up. Now for the Pulley: Weight of the pulley down, normal force up. Now, there is a Force to the right, which creates a torque on the pulley, due to the friction with the belt. My question is: 1) is the force to the right(on the pulley) = to the frictional force on the belt? or 2) force to the right(on the pulley) = Force applied - Frictional force(both of the belt) I believe the Torque on the pulley is only due to friction, so I would assume 1 is correct, but I've heard arguments for 2, and since 2 is a force to the right, since Fapplied > Ffriction, its been bugging me which is correct. Thanks [/QUOTE]
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Torque on Pulley sitting on moving belt
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