The S- I- unit of force is -newton- 1 N is equal to-A- 1 kg m 2 sec -1B- 1 kg m sec -1C- 1 kg m 2 sec -2D- 1 kg m sec -2

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Second Law of Motion

The S. I. uni...

Question

The S. I. unit of force is 'newton'. 1 N is equal to:

1 k g m^{2} s e c^{- 1}

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1 k g m s e c^{- 1}

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1 k g m^{2} s e c^{- 2}

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1 k g m s e c^{- 2}

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Solution

The correct option is D $1 k g m s e c^{- 2}$
According to Newton's second law of motion, force is equal to the rate of change in momentum.

Mathematically,
$F = \frac{m (v - u)}{t} F = m a$ .

The force acting on a body of mass $1 k g$ moving in an acceleration of 1 $1 m / s e c^{2}$ is equal to $1 N$ .

Therefore, 1 N is equal to $1 k g \times 1 m s e c^{- 2} = 1 k g m s e c^{- 2}$ .

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