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NEET Physics · Hard

Gravitation: Orbital Mechanics MCQ

Solve this quality-checked NEET multiple-choice question, then review the correct answer and explanation.

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Orbital MechanicsHardQuestion 6275

Question

A satellite of mass m revolves in circular orbit r₁. To transfer to orbit r₂ > r₁, minimum energy required:
  1. A
    GMm(1/r₁−1/r₂)/2
    Correct
  2. B
    GMm(1/r₂−1/r₁)/2
  3. C
    GMm/r₁
  4. D
    Zero

Correct answer

GMm(1/r₁−1/r₂)/2

Explanation

ΔE = E₂−E₁ = −GMm/2r₂ − (−GMm/2r₁) = GMm(1/r₁−1/r₂)/2.

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