Question

SI unit of gravitational constant is

• A. Nm²kg²
  
• B. Nm²kg^-2
  
• C. Nm²s^-2
  
• D. Nmkg^-2

Answer 1

The correct option is B

Nm²kg^-2

B $\left(N{m}^{2}k{g}^{-}2\right)$
Gravitational constant can be written as
$G=\frac{F{r}^2}{m^2}$
So its SI unit is $N{m}^2/k{g}^2$ or $N{m}^{2}k{g}^{-2}$.