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A man of weight 50kg carries an object to a height of 20m in a time of 10s. The power used by the man in this process is 2000W, then find the weight of the object carried by the man (take, $g = 10 m s^{- 2}$ )

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100 kg

50 kg

25 kg

10 kg

answer is C.

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Detailed Solution

$P = \frac{w o r k}{t i m e}$

$2000 = \frac{(M + m) g h}{t}$

$2000 = \frac{(50 + m) \times 10 \times 20}{10}$

$m = 50 k g$

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