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Question
Draw a labelled diagram of an arrangement of two pulleys, one fixed and other movable. In the diagram, mark the directions of all forces acting on it. What is the ideal mechanical advantage of the system? How can it be achieved?
Solution
The ideal mechanical advantage of this system is 2. This can be achieved by assuming that the string and the pulley are massless and that there is no friction in the pulley bearings, at the axle, or between the string and the surface of the pulley rim.
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