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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 isA. constant at all pointsB. zero at all pointC. maximum at `A`D. minimum at `D` |
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Answer» Correct Answer - 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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