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NEET2009PhysicsGravitationActual

The figure shows elliptical orbit of a planet m about the sun S . The shaded area SCD is twice the shaded are SAB . It t₁ is the time for the planet to move from C to D and t₂ is the time to move from A to B then

Options

  1. At ₁= t ₂
  2. Bt₁>t₂
  3. Ct₁=4 t₂
  4. Dt₁=2 t₂

Correct answer

D. t₁=2 t₂

Step-by-step solution

Kepler's 2^ nd law aligned & ( A t )_ planet = constant & A ₁ t ₁ = A₂ t₂ & 2 ~A t ₁ = A t₂ & t ₁=2 t ₂ aligned

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