Dimensions of Universal Gravitational Constant – Rankers Physics

Dimensions: Practice Problem & Solution

The dimensions of universal gravitational constant are: [2004]
\(ML^2T^{-1}\)
\(M^{-1}L^3T^{-2}\)
\(M^{-2}L^2T^{-1}\)
\(M^{-1}L^3T^{-2}\)

Solution Explained:

To solve this problem, we apply the core principles of Dimensions. Understanding the underlying formula is key to arriving at the correct answer below:

From \(F = G \frac{m_1 m_2}{r^2}\), we get \(G = \frac{Fr^2}{m_1 m_2}\). So, \([G] = \frac{(MLT^{-2})(L^2)}{M^2} = M^{-1}L^3T^{-2}\).

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