Frequently Asked Questions
Gravitation is the force of attraction between any two objects in the universe.
Sir Isaac Newton formulated the Universal Law of Gravitation.
Every object attracts every other object with a force proportional to the product of their masses and inversely proportional to the square of the distance between them.
\(F=G \frac{Mm}{d^2}\), where \(G\) is gravitational constant, \(M\) and \(m\) are masses, and \(d\) is distance.
Free fall is the motion of an object under gravity only, without air resistance.
It is the acceleration produced in a body due to gravitational force, denoted by \(g\), approximately \(9.8\, m/s^2\) on Earth.
Because acceleration due to gravity is constant and does not depend on mass when air resistance is negligible.
Mass is the amount of matter; weight is the force of gravity on the mass and can vary by location.
Moon’s gravity is about 1/6th Earth's, so weight decreases but mass remains the same.
Buoyancy is the upward force exerted by a fluid that opposes the weight of an object immersed in it.
Buoyant force on an object equals the weight of the fluid displaced by it.
The Moon and Sun’s gravity pull ocean water, causing tides.
‘g’ is acceleration due to gravity, varying slightly with location on Earth.
It keeps planets, moons, and satellites in orbit, shapes galaxies, and causes tides.
Earth’s gravity pulls all objects towards its center.