Question

3.
What do you understand by gravitational forcę,

Answer 1

Answer:

the force which have only attractive nature

Answer 2

Explanation:

Gravity (from Latin gravitas 'weight'), or gravitation is a physical connection between space and matter that is precisely described by Einstein’s geometric theory of gravity, which put simply says:

"Space acts on matter, telling it how to move.

In turn, matter reacts back on space, telling it how to curve."

In other words, matter here curves space here. To produce a curvature in space here is to force a curvature in space there.

Thus matter here influences matter there.

That is Einstein’s explanation for ‘gravitation'."

"Nowhere does Einstein’s great conception stand out more clearly than here, that the geometry of space is a new physical entity, with degrees of freedom and a dynamics of its own."

Gravity is most accurately described by the general theory of relativity (proposed by Albert Einstein in 1915), which describes gravity not as a force, but as a consequence of masses moving "straight ahead" in a curved spacetime caused by the uneven distribution of mass.

The most extreme example of this curvature of spacetime is a black hole, from which nothing—not even light—can escape once past the black hole's event horizon.

However, for most applications, gravity is well approximated by Newton's law of universal gravitation, which describes gravity as a force causing any two bodies to be attracted toward each other, with magnitude proportional to the product of their masses and inversely proportional to the square of the distance between them.

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