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OpenStudy (anonymous):
how much power is needed to lift 200-n object to a height of 4m in 4 s ?
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OpenStudy (anonymous):
velocity is 1m/s. W = KEf - KEi. (where f=final and i=initial). KE =1/2mv^2. KEi=0 because initial velocity is 0, so W=KEf=1/2mv^2=1/2*m*1. Just plug in mass
OpenStudy (anonymous):
is 200-n the mass, or a 200 newton object?
OpenStudy (anonymous):
power=work/time work=mgh =200*10*4=8000J power=8000/4=2000W
OpenStudy (anonymous):
newton object
OpenStudy (anonymous):
2000w
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OpenStudy (anonymous):
so you got it.
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