The law of gravity, also known as the law of universal gravitation, is a fundamental concept in physics that describes the force of attraction between two objects with mass or energy. Formulated by Sir Isaac Newton, it states:

Newton’s Law of Gravity:

“Every point mass attracts every other point mass by a force acting along the line intersecting both points. The force is proportional to the product of their masses and inversely proportional to the square of the distance between their centers.”

Mathematically, this is expressed as:

F = G * (m1 * m2) / r^2

Where:

· F = gravitational force between two objects
· G = gravitational constant (6.67408e-11 N*m^2/kg^2)
· m1 and m2 = masses of the two objects
· r = distance between the centers of the two objects

This law explains:

1. Objects falling towards the ground
2. Planets orbiting around stars
3. Tides caused by gravitational pull of the moon
4. The curvature of space-time

Albert Einstein later refined this concept with his theory of General Relativity, which describes gravity as the curvature of spacetime caused by mass and energy.