alleryTwo satellites of same mass orbit Earth at radii r and 2r. Ratio of their kinetic energies:
A1:1
B4:1
C1:2
D2:1
Answer & Solution
Correct answer: D. 2:1
KE = GMm/(2r). KE ∝ 1/r.
KE₁/KE₂ = (2r)/r = 2. So 2:1.
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