The law of universal gravitation, formulated by Sir Isaac Newton, describes the gravitational force between two objects. According to the law, every particle attracts every other particle in the universe with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. Mathematically, it can be expressed as:
F = G * (m1 * m2) / r^2
Where F is the gravitational force between two objects, m1 and m2 are the masses of the objects, r is the distance between their centers of mass, and G is the gravitational constant.
Gravity is the force that attracts objects towards each other. It is a fundamental force of nature that acts between any two objects with mass. Gravity is responsible for keeping planets in orbit around the sun, objects falling towards the Earth's surface, and many other phenomena.
Weight is the force of gravity acting on an object's mass. It is defined as the product of an object's mass and the acceleration due to gravity. Weight can vary depending on the strength of the gravitational field where an object is located. For example, an object will weigh less on the moon than on Earth due to the moon's weaker gravity.
Mass, on the other hand, is a measure of the amount of matter in an object. It is a scalar quantity and is independent of the location and gravitational field strength. Mass remains constant regardless of the object's location, whereas weight can change depending on the strength of the gravitational field. Mass is usually measured in kilograms (kg).
In summary, Newton's law of universal gravitation explains the gravitational force between two objects, gravity is the force responsible for the attraction between objects with mass, weight is the force of gravity acting on an object's mass, and mass is a measure of the amount of matter an object contains.
Law universal gravitation, Newton, gravity, weight, mass
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