Question:

Law of gravitation is not applicable if A) Velocity of moving objects are comparable to velocity of light B) Gravitational field between objects whose masses are greater than the mass of sun.

Updated On: Mar 6, 2024
  • A is true, B is false
  • A is false, B is true
  • Both A & B are true
  • Both A & B are false
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The Correct Option is C

Solution and Explanation

Answer (c) Both A & B are true
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Concepts Used:

Gravitation

In mechanics, the universal force of attraction acting between all matter is known as Gravity, also called gravitation, . It is the weakest known force in nature.

Newton’s Law of Gravitation

According to Newton’s law of gravitation, “Every particle in the universe attracts every other particle with a force whose magnitude is,

  • F ∝ (M1M2) . . . . (1)
  • (F ∝ 1/r2) . . . . (2)

On combining equations (1) and (2) we get,

F ∝ M1M2/r2

F = G × [M1M2]/r2 . . . . (7)

Or, f(r) = GM1M2/r2

The dimension formula of G is [M-1L3T-2].