stated in his Universal Law of Gravitation that every particle in
the universe is attracted to every other particle. The mass of the
particle determines the amount of pull. Mass is the quantity of
substance in the particle. The mass and the distance between the
particles cause the gravitational pull.
Newton’s Law of Gravitation states that:
- Any object or piece of matter, from a planet to a pinhead,
has an attracting or gravitational force.
- The gravitational force between two objects is proportional
to the product of their masses.
- The gravitational force varies with the distance between the
two objects (the gravitational force of an object weakens extremely
quickly as you get farther from it). Mathematically, the force
weakens according to the inverse square of the distance (in math, a
square is a number multiplied by itself, and an inverse square is
that number divided by one). If the distance between two objects is
doubled, the force between them is reduced to one-fourth. It the
distance is tripled, the force is reduced to one-ninth, and so
- The formula is:
F = Gm1m2/r2,
Where F is the gravitational force, G is the
gravitational constant (a number that is always the same),
m1 and m2 are the masses of the two
objects, and r is the distance between them.