What is gravitation?
Answer
Gravitation is the universal attractive force between any two bodies having mass, whose magnitude follows Newton's law of gravitation.
The working
Definition
Gravitation is the force of mutual attraction that acts between every pair of objects in the universe due to their masses.
Newton's law
The force is given by F = G × m₁ × m₂ ÷ r², where m₁ and m₂ are the masses and r is the distance between their centres.
Gravitational constant
G is the universal gravitational constant, equal to about 6.67 × 10⁻¹¹ N·m²/kg², the same everywhere in the universe.
Nature
This force is always attractive, acts along the line joining the two masses, and keeps planets in orbit and objects bound to Earth.
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