Answer to Question #273154 in Physics for jopay

Question #273154

The motor is used in lifting a 200 kg object at a constant speed of 3 cm/s. What power is being developed by the motor?

Expert's answer

By the definition of the power, we have:

P=\dfrac{W}{t}=\dfrac{Fh}{t}=Fv=mgv,

P=200\ kg\times9.8\ \dfrac{m}{s^2}\times3\ \dfrac{cm}{s}\times\dfrac{1\ m}{100\ cm}=58.8\ W.

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