A block and tackle system of pulleys has velocity ratio 4 then what will be its velocity ratio if the weight of the movable block is doubled?
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that 1 m of rope must come over the pulley and so the load rises 1 m. This means that the velocity ratio of our pulley system is 1. However if the pulley is 100 % efficient and the velocity ratio is 1 then the mechanical advantage is also 1 and that means that the load and effort are the same.
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