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Per NCERT §7.2 (2nd law), Kepler's law of areas states which quantity is constant for a planetary orbit?
AOrbital radius r
BAngular acceleration α
CLinear speed v
DAreal velocity (dA/dt)
Answer & Solution
Correct answer: D. Areal velocity (dA/dt)
NCERT §7.2(2): the line joining Sun-planet sweeps equal areas in equal times. Equivalent to L = constant.
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