If a cage containing a truck of coal weighing 750 kg is r...
If a cage containing a truck of coal weighing 750 kg is raised to a height of 90 m in a minute, what is the total power expended?
[g = 10 ms2]
11.50 kw
12.60 kw
11.25 kw
12.10 kw
Correct answer is C
Power = workdonetimetaken
where 1 min = 60s
= mght
= 750×10×9060
= 11250w or 11.25kw
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