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Manipal MET2019PhysicsGravitation

If the density of earth is doubled keeping its radius constant, then acceleration due to gravity g is

Options

  1. A20 ~m / s ^2
  2. B10 ~m / s ^2
  3. C5 ~m / s ^2
  4. D2.5 ~m / s ^2

Correct answer

A. 20 ~m / s ^2

Step-by-step solution

g= G M_e R_e^2 =G 4 3 R_e^3 d R_e^2 = 4 3 G R_e dg d So, if density is doubled, then acceleration due to gravity will also be doubled.

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