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1mm. 4) 46) At the gym, a man pulls a bar on a machine that works the muscles of the upper back. It takes him
1mm. 4) 46) At the gym, a man pulls a bar on a machine that works the muscles of the upper back. It takes him 0.5 seconds to raise 30 kilograms of weights a vertical distance of 0.5 meters. Which of these exerts the same power output? (Estimate 9 as 10 m/sZ.) A) lifting 25 kilograms a distance of 2.4 meters in 20 seconds B) lifting 45 kilograms a distance of 2.4 meters in 3.0 seconds C) leg pressing 45 kilograms a distance of 0.5 meters in 0.5 seconds D) bench pressing 30 kilograms a distance of 0.5 meter in 1.5 seconds
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