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How many Newtons make $1 kg . wt$ ?

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4.9 N

98 N

49 N

9.8 N

answer is D.

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Detailed Solution

9.8 N

is equal to

1 kg . wt

.
The weight of an object is the force with which the gravitational force pulls it. A Newton, which is equal to

kg m / s^{2}

, is the SI unit of weight (

N

). The formula

W = mg

, which denotes weight as the gravitational force exerted on a mass, can be written as

kg m / s^{2}

, which is equivalent to

N

. One kilogram weight is the force that the earth applies to a mass of one kilogram.
An object's weight,

W

, is equal to its mass (

m

) times its acceleration due to gravity (

g

W = mg

Therefore, the weight of a mass of

1 kg

will be:
If

m = 1 kg

W = 1 \times 9.8

= 1 kg . wt

We are aware that,

1 kg m / s^{2} = 1 N

\Rightarrow 1 kg . wt = 9.8 N

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