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A planet travels in an elliptical orbit ...

A planet travels in an elliptical orbit about a star as shown. At what pair of points is the speed of the planet the same?

A

W and S

B

P and T

C

P and R

D

Q and U

Text Solution

Verified by Experts

The correct Answer is:
D
In planetary motion,
Area velocity remain constant
So, `L/(2m)` = const `rArr (mwr^2)/(2m)` =const `rArr (mvr)/(2m)` = const
Hence, the velocity of the planet will be equal at the position which are at the same distance from the star.
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