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It would be more accurate to ask whuch pulley takes the least amount of FORCE. WORK=FORCE X DISTANCE so ultimately the amount of work will be the same depending on how far the load moves. If you are wondering which pully will be the easiest to use than you need to know something about pulleys. Each time a rope passes through a pulley, the amount of FORCE needed to move a load decreases. The more passes the greater the MECHANICAL ADVANTAGE. But, there is a trade off. You may not need to pull as hard, (less force) but you will have to pull more rope (greater distance) to move the load. So the total amount of work remains equal.
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an expert audience - novanet
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A pulley.
