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CBSE Class 11-science Answered

how to conserve angular momentum? please explain.
Asked by yashrajgharte24.12dgatl | 09 Aug, 2021, 02:51: PM
Expert Answer
If there is no external torque acting on a body which is in rotational motion , then angular momentum is conserved.
 
In linear motion, if there is no external force acting on a body which is in linear motion, then linear momentum is conserved .
 
Conservation of linera momentum means, no change in momentum or no change in velocity of body.
 
Similarly , when a body is in rotational motion, to stop its motion or to increase its rotational speed, external torque has to be applied,
 
If there us a change in rotational speed due to external torque, angular momentum changes , hence angular momentum is not conserved.
 
But if there is no external torque, its speed of rotation remains constant and angular momentum is conserved.  
Answered by Thiyagarajan K | 09 Aug, 2021, 03:08: PM
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