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Calculate the power of a crane I watts, which lifts a mass of 100 kg to a height of 10 m in 20s.

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Calculate the power of a crane I watts, which lifts a mass of 100 kg to a height of 10 m in 20s.

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F = mg = 100 × 9.8 N [m = 100 kg, g = 9.8 m/s2]

Power P = \(\frac{mgh}{t}\)W

= \(\frac{100×9.8×10}{20}\)W

= 490 W

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