Define one newton of force.

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Solution

Newton is the SI unit of force.
From Newton's second law of motion, we have
$F = m a (w h e r e m i s t h e m a s s o f t h e b o d y a n d a i s t h e a c c e l e r a t i o n)$
3. If $m = 1 k g a n d a = 1 m s^{- 2}$ , then,
$F = 1 k g \times 1 m s^{- 2} = 1 n e w t o n$
4. Hence One newton is defined as the force that is required to accelerate a mass of $1 k g$ by $1 m s^{- 2}$ in the direction of applied force.

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