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In SI unit of force ‘Newton’ (N) is given by (where m stands for metre

June 1, 2025 by rawan239

In SI unit of force ‘Newton’ (N) is given by (where m stands for metre and s stands for second):

1 N = 1 kg/ms²

1 N = 1 kgm/s²

1 N = 1 kg s²/m

1 N = 1 kg m s²

This question was previously asked in

UPSC NDA-2 – 2015

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The correct option is B, 1 N = 1 kgm/s².

The SI unit of force, the Newton (N), is defined based on Newton’s second law of motion, which states that force (F) equals mass (m) multiplied by acceleration (a): F = ma. The SI unit of mass is the kilogram (kg), and the SI unit of acceleration is meters per second squared (m/s²). Therefore, 1 Newton is defined as the force required to accelerate a mass of 1 kilogram at a rate of 1 meter per second squared. This gives the relationship 1 N = 1 kg * (m/s²), or 1 N = 1 kgm/s².

The Newton is a derived unit in the SI system. It is named after Sir Isaac Newton in recognition of his work on classical mechanics. Other units of force exist, such as the dyne (in the CGS system) or the pound-force (in imperial units), but the Newton is the standard unit in SI.

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