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Mahfooz Khan Grade: 12
`        Describe me physical meaning of angular momentum`
6 years ago

## Answers : (1)

SAGAR SINGH - IIT DELHI
879 Points
```										Dear student,
Ordinary momentum is a measure of an object's tendency to move at constant speed along a straight path.  Momentum depends on speed and mass. A train moving at 20 mph has more momentum  than a bicyclist moving at the same speed. A car colliding at 5 mph does not  cause as much damage as that same car colliding at 60 mph. For things moving in  straight lines momentum is simply mass ×  speed. In astronomy most things move in curved paths so we generalize the idea  of momentum and have angular momentum. Angular momentum measures an object's tendency to continue to spin. An ``object'' can be either a single body or two or more bodies acting together as a single group.
angular momentum = mass × velocity × distance (from point object is  spinning or orbiting around)
Very often in astronomy, the object (or group of objects) we're observing has  no outside forces acting on it in a way to produce torques that would disturb  the angular motion of the object (or group of objects). A torque is simply a force acting along a line that is off the object's spin axis. In these cases,  we have conservation of angular momentum.
conservation of angular momentum---the total amount of angular momentum does  not change with time no matter how the objects interact with one another.

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Sagar Singh
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```
6 years ago
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