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NEET Physics · Medium

Gravitation: Gravitational Potential MCQ

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Gravitational PotentialMediumQuestion 6266

Question

Work done by gravitational force moving mass m from r₁ to r₂ (r₂ > r₁):
  1. A
    GMm(1/r₁−1/r₂)
    Correct
  2. B
    GMm(1/r₂−1/r₁)
  3. C
    −GMm/r₁
  4. D
    GMm×r₁

Correct answer

GMm(1/r₁−1/r₂)

Explanation

W = −ΔPE = −[−GMm/r₂ − (−GMm/r₁)] = GMm(1/r₁−1/r₂). (Negative as r increases.)

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