Determination Of Gravitational Constant G
Concepts and definitions:
 Cavendish Experiment:
 It was an experiment conducted in 179798 by British scientist Henry Cavendish to measure the gravitational constant.
 The experiment involved measuring the very tiny force of attraction between two lead balls of known mass.
 From this measurement, Cavendish calculated the value of the gravitational constant accurately.
 Repulsion and Attraction:
 Repulsion: Force of repulsion occurs when bodies having the same charge interact with each other.

**Attraction**: Force of attraction occurs when two bodies having opposite charges interact with each other.
 Torsion Balance:

A torsion balance is a sensitive instrument that measures tiny torsional forces (twisting forces) acting on a suspended fiber or wire.

It consists of a suspended horizontal beam with two masses attached to its ends, and a graduated circular scale to measure the angle of rotation of the beam when a force is applied.
 Newton’s Law of Gravitation:
 This law describes the force of attraction between any two objects with mass in the universe.
 The law states that every particle of matter in the universe attracts every other particle with a force directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
 Gravitational Constant:
 The gravitational constant, denoted by (G), is a fundamental physical constant that appears in Newton’s law of gravitation.
 It represents the proportionality factor between the gravitational force between two objects and the product of their masses and the square of the distance between them.