A pulley P is attached to the ceiling at O by a piece of metal that can swing freely. One end of a rope is attached to the ceiling at A. The rope is passed through the pulley P and a weight is attached to the other end of the rope at M, as shown in the diagram. M The distance OA is 1 m, the length of the rope is 2 m, and the length of the piece of metal OP=r metres, where 0
A pulley P is attached to the ceiling at O by a piece of metal that can swing freely. One end of a rope is attached to the ceiling at A. The rope is passed through the pulley P and a weight is attached to the other end of the rope at M, as shown in the diagram. M The distance OA is 1 m, the length of the rope is 2 m, and the length of the piece of metal OP=r metres, where 0
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