Question

A planet is revolving around the sun in elliptical orbit. Its closest distance from the sun is r and farthest distance is R. If the orbital velocity of the planet closest to the sun be v, then what is the velocity at the farthest point ?

• A. $\frac { \mathrm { vr } } { \mathrm { R } }$
• B.
• C.
• D.

Answer 1

Answer: (A)

$\frac { \mathrm { vr } } { \mathrm { R } }$

Answer 2

From Keplar's law VR = constant

so Vr = V'R Ž V' = Vr/R