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A planet moves around the sun in an elli...

A planet moves around the sun in an elliptical orbit. When earth is closest from the sun, it is at a distance `r` having a speed `v`. When it is at a distance `4r` from the sun its speed will be:

A

`4v`

B

`v/4`

C

`2v`

D

`v/2`

Text Solution

Verified by Experts

The correct Answer is:
B
From kepler's `2nd` law, `1/2 rv =const`.
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