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Question 30743
JEE Physics · Hard

Gravitation: Orbital KE and PE MCQ

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Orbital KE and PEHardQuestion 30743

Question

For a satellite in circular orbit, which is correct?
  1. A
    KE = PE
  2. B
    |KE| = |PE|/2
    Correct
  3. C
    |KE| = |PE|
  4. D
    Total energy = |KE|

Correct answer

|KE| = |PE|/2

Explanation

For circular orbit: KE = GMm/2r. PE = −GMm/r. |KE| = |PE|/2. Total E = KE + PE = −GMm/2r = −|KE|.

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