STANDARD Physics Power MCQ Question
A crane lifts a mass of 100 kg to a height of 10 m in 20 s. The power of the crane is (Take g = 10 m s⁻²)
100 W
200 W
250 W
500 W
Correct Answer
Detailed Explanation
The power of the crane is calculated using the formula P = (mgh)/t. Substituting the given values, P = (100 kg × 10 m s⁻² × 10 m) / 20 s = 500 W.
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