Question

1. State Universal law of Gravitation.

2. Express it in a mathematical form.

3. State the value of universal gravitational constant in S.I unit. (3

a) Write any two Importance of the law of Gravitation ? ​

Answer 1

1)Newton's law of gravitation, statement that any particle of matter in the universe attracts any other with a force varying directly as the product of the masses and inversely as the square of the distance between them.

2)Newton's universal law of gravitation: every particle in the universe attracts every other particle with a force along a line joining them; the force is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.

3)In SI units, G has the value 6.67 × 10-11 Newtons kg-2 m2. The direction of the force is in a straight line between the two bodies and is attractive.

4)Importance of The Universal Law of Gravitation

Importance of The Universal Law of GravitationIt binds us to the earth. It is responsible for the motion of the moon around the earth. It is responsible for the motion of planets around the Sun. Gravitational force of moon causes tides in seas on earth.

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