The earth attracts a body of mass $1 k g$ with a force of $10 N$ . The mass of a boy is $50 k g$ . His weight will be

5 N

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50 k g

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500 N

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50 N

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Solution

The correct option is C $500 N$
We know,
$W = m g$
where,
$W = Weight of the object$ ,
$m = mass of object$ , and
$g = acceleration due to gravity$

$g = \frac{F}{m}$

Given, $m = 1 k g$ and its weight, $W = 10 N$

$g = \frac{10 N}{1 k g} = 10 N k g^{- 1}$

If $m = 50 k g$ , its weight $W$ will be,
$W = m g$
$= 50 k g \times 10 N k g^{- 1}$
$= 500 N$
Hence, option (b) is correct.

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