Physics
A single fixed pulley and a movable pulley both are separately used to lift a load of 50 kgf to the same height. Compare the efforts applied in an ideal situation.
Machines
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Answer
We know that in case of a single fixed pulley, the effort applied is equal to the load.
Hence,
In the case of a movable pulley the effort needed to lift a load is equal to half the load.
Hence, the ratio of efforts applied by the respective pulley is
Therefore, Ef : Em = 2 : 1
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