- #1
conorwood
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Looking at the free body diagram of a fixed pulley with a rope going over the top half, the diagram would show tension going downward on either side and an anchor going up equaling twice the tension. I understand this is this case so the pulley doesn't move in any rectilinear motion. However, since the tensions are equal, the torque cause by the forces of tension are equal and opposite and they cancel out. I am having trouble understanding what causes angular acceleration in this case, for example when two masses of different size are attached to the ends of the rope.
Thanks
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