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

100 k g

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5 k g

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50 k g

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10 k g

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Solution

The correct option is D $50 k g$

Let the mass of object be $x$
$P = \frac{(M + x) g h}{t}$

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

$1000 = 500 + 10 x$

$10 x = 500$
$\Rightarrow x = 50 k g$

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A man of weight 50 kg carries an object to a height of 20 m in a time of 10 s. The power used by the man in the this process is 2000 W, then find the mass of the object carried by the man.[assume g=10ms−2]

The correct option is D 50 kg Let the mass of object be xP=(M+x)ght 2000=(50+x)×10×2010 1000=500+10x 10x=500⇒x=50 kg

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

The correct option is D $50 k g$

Let the mass of object be $x$
$P = \frac{(M + x) g h}{t}$

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

$1000 = 500 + 10 x$

$10 x = 500$
$\Rightarrow x = 50 k g$