The motor of an elevator can produce 2200w of power. The elevator has a mass of 1100kg complete with contents. At what constant speed will the elevator rise?

Question

The motor of an elevator can produce 2200w of power. The elevator has a mass of 1100kg complete with contents.  At what constant speed will the elevator rise?

anonymous · Answer

Do they give you an equation?

karlaltr · Answer

no:/

dan815 · Answer

power is the rate of work

dan815 · Answer

The unit for watts is Jules/sec = N*m/sec

dan815 · Answer

can u figure it out now?

karlaltr · Answer

im confused because wouldnt we be using a formula like a=v/t?

dan815 · Answer

power is the rate of work being done
work=force*distance

work/time = Power

dan815 · Answer

work/time = force*distance/time
but distance/time = speed so
force * V = power

1100kg gives u 1100kg*9.81m/s^2 = approximately 11000 Newtons of Force

dan815 · Answer

11000 * speed= 2200  watts

karlaltr · Answer

i think that makes sense thank you!

dan815 · Answer

ok good

dan815 · Answer

you can see the units match up too

11000 * speed= 2200  watts
newtons * m/s = newtos *m/s

watts=work/time = Force*distance/time = newtons * meters / sec