At the gym, a woman lifts 40 kilograms of weights on the leg press machine. It takes her 0.5 seconds to raise the weights a vertical distance of 0.4 meters.

How much power does the woman generate when lifting the weights?
A) 180 watts
B) 200 watts
C) 320 watts
D) 500 watts

In this problem, the work is equal to the increase of the potential energy of the weights.

∆ PE = 40 * 9.8 * 0.4 = 156.8J
Power = 156.8 / 0.5 = 313.6 watts
If use 10 m/s^2 for g, the power will be 320 watts.

I hope this helps!

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At the gym, a woman lifts 40 kilograms of weights on the leg press machine. It takes her 0.5 seconds to raise the weights a vertical distance of 0.4 meters. How much power does the woman generate when lifting the weights? A) 180 watts B) 200 watts C) 320 watts D) 500 watts

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At the gym, a woman lifts 40 kilograms of weights on the leg press machine. It takes her 0.5 seconds to raise the weights a vertical distance of 0.4 meters.

How much power does the woman generate when lifting the weights?
A) 180 watts
B) 200 watts
C) 320 watts
D) 500 watts