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A Problem from power

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Gayathri Shinde Asks:


“Please answer this question with explanation:

The power output of a machine that lifts a 600 kg
weight through a height of 20m in 1min is:
@)1.96kW    b)0.98kW

c)12kW      d)3.92kW”

Answer:

Use the formula power = work /time

P = \frac{mgh}{t}
[youtube=http://www.youtube.com/watch?v=BVxEEn3w688&rel=0&w=480&h=390]

 


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