Question

How many newton are contained in $10kgf$?

Answer 1

1. The gravitational units of force are gf (in C.G.S.) and kgf (in S.I.).
2. $1kgf$ is the force which produces an acceleration of $g$ in a mass of 1 kg.
3. Since the value of $g$ is given as $10m{s}^{-2}$,

$$\begin{gathered} 1kgf=1kg\times 10m{s}^{-2} \\ =10kgm{s}^{-2} \\ =10N \\ \Rightarrow 10kgf=10\times 10N \\ =100N \end{gathered}$$