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A planet is revolving around the sun in ...

A planet is revolving around the sun in an elliptcal orbit. Its `KE` is different for different points and the total energy is negative. Its linear momentum is not conserved the eccentricity decides the shape of the orbit.
Net torque on the planet is

A

constant at all points

B

zero at all point

C

maximum at `A`

D

minimum at `D`

Text Solution

Verified by Experts

The correct Answer is:
B
Gravitational force, net torque is zero at all points.
`vectau=(dvecL)/(dt)`
Since angular momentum is conserved. So `vectau=0`, then `L=` constant and conserved.
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