NDA2025General AbilityGeneral ScienceActual
The universal constant of gravitation G has the unit
Options
- AN
- Bm/s
- CJoule
- DN-m ^2 /kg ^2
Correct answer
D. N-m ^2 /kg ^2
Step-by-step solution
According to Newton's law of gravitation, the force between two masses is given by F = G m₁ m₂ r^2 . Rearranging the formula for the universal gravitational constant G , we get G = F r^2 m₁ m₂ . Substituting the SI units for force ( N ), distance ( m ), and mass ( kg ), the unit of G is N m^2 kg kg = N-m^2/kg^2 . Answer: N-m ^2 /kg ^2