Maharashtra State BoardHSC Science (General) 11th

Answer the following question. What do you mean by gravitational constant? State its SI units. - Physics

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Short Note

Answer the following question.

What do you mean by a gravitational constant? State its SI units.

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Solution

  1. From Newton’s law of gravitation,
    F = G`("m"_1"m"_2)/"r"^2`
    where, G = constant called universal gravitational constant. Its value is 6.67 × 10-11 N m2/kg2.
  2. G = `"Fr"^2/("m"_1"m"_2)`
    If m1 = m2 = 1 kg, r = 1 m then F = G.
    Hence, the universal gravitational constant is the force of gravitation between two particles of unit mass separated by unit distance.
  3. Unit: N m2/kg2 in SI system.
Concept: Universal Law of Gravitation
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APPEARS IN

Balbharati Physics 11th Standard Maharashtra State Board
Chapter 5 Gravitation
Exercises | Q 2. (xiii) | Page 97
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