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### Course: Mechanics (Essentials) - Class 11th > Unit 12

Lesson 7: Why do helicopeters have a second rotor on the tail?- Conservation of angular momentum
- Conservation of angular momentum
- Worked example: Conservation of angular momentum
- Ball hits rod angular momentum example
- Predicting changes in momentum during collisions
- Conservation of angular momentum review
- Conservation of angular momentum calculations

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# Conservation of angular momentum calculations

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