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L09c - Physics 111 Lecture 9c"Logic takes you from A to B...

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1 / 6 Physics 111 Lecture 9c “Logic takes you from A to B. Imagination takes you anywhere.” –Albert Einstein

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Angular Momentum Angular Momentum Question Examples Question 2 / 6 We are aware of linear momentum. There is a rotational equivalent called angular momentum L = (1) Does it look familiar? Example: What is the angular momentum of the Earth as it rotates around the Sun? The SI units of angular momentum are kg · m 2 /s Conservation of angular momentum: If the net external torque acting on a system is zero, L is conserved L i = L f (2) Does it look familiar?
Angular Momentum Angular Momentum Question Examples Question 3 / 6 Angular momentum creates an “axis of stability” that takes some effort to change, because angular momentum would prefer to be conserved (gyroscope, tops) From the definition of angular momentum, you can see that if you decrease your moment of inertia, your angular velocity will increase Example: A figure skater is spinning when her arms and

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L09c - Physics 111 Lecture 9c"Logic takes you from A to B...

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