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A force of $20 N$ acts upon a body whose weight is $9.8 N$ . The mass of the body is:

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3 kg

5 kg

1 kg

2 kg

answer is C.

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Detailed Solution

A force of

20 N

acts upon a body whose weight is

9.8 N

. The mass of the body is

1 kg

.
Here weight of the body,

W = 9.8 N

Acceleration due to gravity,

g = 9.8 m / s^{2}

Let

m

be the mass of the body
We know that,

W = mg

\Rightarrow m = \frac{W}{g}

\Rightarrow m = \frac{9.8}{9.8}

\Rightarrow m = 1 kg

Thus, mass of the body is

1 kg

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