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Please explain this question If there is no external force acting on a nonrigid body, which of the following quantities must remain constant : angular momentum, linear momentum, kinetic energy, moment of inertia ? The answers are : angular momentum and linear momentum. Please explain why these are the answers and, why moment of inertia and kinetic energy are not. :)

Please explain this question


If there is no external force acting on a nonrigid body, which of the following quantities must remain constant :

angular momentum, linear momentum, kinetic energy, moment of inertia ?

The answers are : angular momentum and linear momentum.

Please explain why these are the answers and, why moment of inertia and kinetic energy are not. :)

Grade:12

1 Answers

shubham sharma
27 Points
10 years ago
Hey its specified there that it is non rigid body I.e. It''s deformable . Since M.I depends on coordinates , in presence of ext. Force M.I is not conserved.

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