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Gravitation — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysicsGravitation1 Mark
Question
Assume that the law of gravitation changes from inverse square to inverse cube. Does the angular momentum of a planet about the sun will remain constant?
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Answer

The torque on a planet is zero so long as the force is a central force. The angular momentum of planet remains constant so long as torque remains zero.

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