# The Value of the Universal Gravitational Constant (G) was first of all experimentally determined by which physicist?

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The Value of the Universal Gravitational Constant (G) was first of all experimentally determined by which physicist?
2. Franz Aepinus
3. Henry Cavendish
4. Neil Ashby

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Correct Answer - Option 3 : Henry Cavendish

The correct answer is Henry Cavendish.

• The gravitational constant also known as the universal gravitational constant, denoted by the letter G, is an empirical physical constant involved in the calculation of gravitational effects.

• In Newton's law, it is the proportionality constant connecting the gravitational force between two bodies with the product of their masses and the inverse square of their distance.
• In SI units, the value of G is approximately 6.674×10−11 m3kg−1s−2.
• Henry Cavendish was an English natural philosopher, scientist, and an important experimental physicist
• He determined the value of the Universal Gravitational Constant by using an extremely sensitive torsion balance in 1798.