Question

$\textbf{Define Gravitational Constant.}$

$\textbf{And why Gravitational constant is called}$ $\textbf{as Universal Gravitational Constant.?}$​

Answer 1

The gravitational constant, symbolized , is a physical constant that appears in the equation for Newton's law of gravitation.

Answer 2

$\huge \bf{\green{Gravitational\: Constant}}$

✍ Gravitational constant is numerically equal to the force of attraction between the two bodies each of mass 1 kg and separated by a distance of 1m .

★ Gravitational constant is called as universal gravitational constant because :The value of G does not depend on

✍ The nature and size of the bodies .

✍ The nature of the medium between the two bodies .

✍ The physical conditions such as temperature pressure etc of surrounding medium .

✍ Therefore gravitational constant is called as universal gravitational constant .

✍ Scientist Cavendish determine the value of G experimentally in 1798 .

✍ The law gives force between two point masses. But it can be applied to large size bodies by assuming the entire mass of the body concentrated at its centre .