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hawkfalcon

  • 3 years ago

A a rope goes trough a pulley six times, pulling up a 250kg brick with 60% efficiency. How long does it take to pull the block up two meters?

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  1. hawkfalcon
    • 3 years ago
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    |dw:1348436652861:dw|

  2. hawkfalcon
    • 3 years ago
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    1.1s

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