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
2 answers
I believe B is right but I also think that D is right o.o
40*9.81*.4 = work done
power = work /second
so
P = 40 * 9.81 * .4/.5
= 314 Watts
if you used 10 m/s^2 for g you would get C
power = work /second
so
P = 40 * 9.81 * .4/.5
= 314 Watts
if you used 10 m/s^2 for g you would get C
1 answer