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I need help figuring out if a block and tackle is a rope and pulley system that uses multiple pulleys. It multiplies a small force

I need help figuring out if a block and tackle is a rope and pulley system that uses multiple pulleys. It multiplies a small force into a large one. If a motor has a weight of about 2500 N and people pull 4.0 m of rope with a force of 700 N to raise the motor 1.0 m, how efficient is the block and tackle?

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