A planet is revolving in an elliptical orbit about the sun. Its closest distance is R. If `K_(1) and K_(2)` are the maximum and minimum kinetic energies of the planet, `K_(1)//K_(2)`=
A. `R//r`
B. `sqrt(R//r)`
C. `R^(2)//r^(2)`
D. 1

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1 Answers

Correct Answer - c
`(k_(1))/(k_(2))=((1)/(2)mv_(1)^(2))/((1)/(2)mv_(2)^(2))=((v_(1))/(v_(2)))^(2)`
`(k_(1))/(k_(2))=((R)/(r))^(2)`

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