A car of mass 2000 kg is lifted up a distance of 30
m by a crane A in 1 min. A second crane B does
the same job in 2 min. The ratio of power supplied
by the two cranes A and B is
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Explanation:
we know that power generated in a body =work done on that body/time taken.
- Take in notice that formula in the photograph is written wrong......
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