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26 March, 04:24

The power expended when a 10 N barbell is raised 2. 0 m in 2s is

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  1. 26 March, 06:23
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    Work done = (force) x (distance)

    = (10 N) x (2 m) = 20 joules.

    Power = (work done) / (time to do the work)

    = (20 J) / (2 sec)

    = 10 joules/sec = 10 watts.
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