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Rigid Body Dynamics: Angular Momentum — Planet MCQ

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Angular Momentum — PlanetMediumQuestion 30342

Question

A planet in elliptical orbit moves faster when closer to the Sun. This follows from:
  1. A
    Newton's third law
  2. B
    Conservation of energy only
  3. C
    Conservation of angular momentum
  4. D
    Kepler's second law and conservation of angular momentum
    Correct

Correct answer

Kepler's second law and conservation of angular momentum

Explanation

Equal areas in equal times (Kepler's 2nd law) is equivalent to conservation of angular momentum about the Sun.

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