Test Index

COMEDK 2025 Evening Solved Paper

Question : 5 of 180

Marks: +1, -0

The unit of universal gravitational constant is :

Solution:

Concept:

Newton's law of gravitation defines the relationship between gravitational force, masses, and distance, which yields the unit of

G

Explanation:

Start with Newton's law:

F = G \frac{m_1 m_2}{r^2}

Solve for

G

G = \frac{F r^2}{m_1 m_2}

The unit of force

F

\mathrm{N}

(newton).

Distance

r

is in

\mathrm{m}

, and masses

m_1, m_2

are in

\mathrm{kg}

Substitute units:

[G] = \frac{\mathrm{N} \cdot \mathrm{m}^2}{\mathrm{kg}^2} = \mathrm{N} \, \mathrm{m}^2 \, \mathrm{kg}^{-2}

Answer:

Option D:

\mathrm{N} \mathrm{m}^2 \mathrm{~kg}^{-2}

Go to Question:

Prev Question

Next Question