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Physics

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  • $\begingroup$ @DevanshMittal: Your comment sounds like it's answering your own question. This is allowed on SE, but it should be posted as an answer, not a comment. $\endgroup$ Commented Nov 23, 2019 at 15:46
  • $\begingroup$ Kindly confirm following propositions. 1. Angular Acceleration is not the same as Translation Acceleration. Translational Acceleration in an object cannot come without any external force, but the angular acceleration in an object may come without any external torque. 2. External torque is NOT the only source of angular acceleration. Angular acceleration in a rotating body may come even when the moment of inertia of the body is changing. 3. The question is, Are Internal Torques here bringing the angular acceleration in the body? $\endgroup$ Commented Nov 23, 2019 at 15:48
  • $\begingroup$ @DevanshMittal What do you have in mind when you refer to an "internal torque"? $\endgroup$ Commented Nov 23, 2019 at 15:55
  • $\begingroup$ @DevanshMittal And I agree with Ben that you seem to be answering your own question. I was about to post an answer that the reconciliation is conservation of angular momentum which occurs without an external torque. But it seems you are giving that as an answer, except you are also talking about some kind of internal torque. $\endgroup$ Commented Nov 23, 2019 at 15:58
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    $\begingroup$ The reason this argument of internal torque came to my mind because I was starting with the premise that angular acceleration cannot come without external torques, so if we cannot find anything external, so we have to look for something internal. $\endgroup$ Commented Nov 23, 2019 at 16:03