General Science • PhysicsEasy
What is the dimensional formula for universal gravitational constant (G)?
A. M^-1 L^3 T^-2✓ Correct Answer
B. M L^2 T^-2
C. M^-1 L^2 T^-2
D. M L^-2 T^-2
💡 Solution & Explanation
Newtonian gravity dictates that the gravitational force between two point masses equals the product of masses divided by square of distance multiplied by G, making dimensional analysis yield M minus 1 L cubed T minus 2. Incorrect choices confuse force constants with electrical permittivity or pressure dimensions. Knowing fundamental physical constants and their dimensions helps solve numerical problems in competitive engineering and civil services examinations.
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