A 5.8 x 10 4 watt elevator motor can lift


Asked by wiki @ in Physics viewed by 678 People


A 5.8 × 104-watt elevator motor can lift a total weight of 2.1 × 104 newtons with a maximum constant speed of

(1)0.28 m/s
(2)0.36 m/s
(3)2.8 m/s
(4)3.6 m/s

Answered by wiki @



Power is defined as the rate at which work is
done upon an object. Like all rate quantities, power is a time-based quantity.
Power is related to how fast a job is done. Two identical jobs or tasks can be
done at different rates - one slowly or and one rapidly.


P = Fv


Where P is the power


F is the weight


V is the average velocity


 


V = P/F


V = (5.8 x 10^4 W)/ (2.1 x 10^4 N)


V = 2.8 m/s


Do you know the better answer?

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