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April 24, 2014

Homework Help: physics

Posted by kalisha on Saturday, March 13, 2010 at 10:53am.

A weightlifter holding a 500 kg barbell waist high carries the barbell at a constant height and a constant speed to a rack 2 m away, and places the barbell on the rack at the same height at which he was carrying it. How much work does the weightlifter do on the barbell?

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