A 5.8 x 10 4 watt elevator motor can lift
Asked by wiki @ in Physics viewed by 730 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
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