At the gym, a man pulls a bar on a machine that works the

Last updated: 7/23/2022

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 g as 10 m/s2.) A Alifting 25 kilograms a distance of 2.4 meters in 2.0 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