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A planet is revolving around the sun in ...

A planet is revolving around the sun in an elliptical orbit. Which out of the following remains constant.

A

Its total energy is negative at D.

B

It s angular momentum is constant

C

Net torque on the planet about sun is zero

D

Linear momentum of the planet is conserved

Text Solution

Verified by Experts

The correct Answer is:
A, B, C
For (A) : For a bond system, the total energy is always negative.
For (B) : For central force field, angular momentum is always conserved.
For (C) : For central force field, torque `=0`
For (D) : In presence of external force, linear momentum is not conserved.
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