Question

The relation between the $S.I.$ unit of force and the weight of a $1kg$ mass is :

• A. $1kgf=1N$
• B. $1kgf=0.98N$
• C. $1kgf=9.8N$
• D. $1N=9.8kgf$

Answer 1

The correct option is C $1kgf=9.8N$

Answer is C.

The S.I. unit of force is Newton, the absolute unit of force in the International System of Units (SI units). It is defined as that force necessary to provide a mass of one kilogram with an acceleration of one metre per second per second.

S.I. unit of Force = $Mass\left(kg\right)\times AccelerationduetoGravity\left(g\right)\left(9.8m/s^2\right)$ = Newton

Force (Newton) = Mass x g

For example, The weight (force) of a mass of 1 kg = 1 x 9.8 = 9.8 N

Hence, 1 kgf = 9.8 N