How much power does a weightlifter expend when lifting a 50 -kg barbell a vertical distance of 1.2m in a? time interval of 1.5s?
Answer
You mean what power is he operting at, if it's constant work?
50kg(9.8m/s^2)(1.2m) = 588J
Average power = 588J/1.5s = 392watts
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