16. Angular Momentum

Conservation of Angular Momentum

Conservation of Angular Momentum Introduction and Demonstrations

Ice skater closes her arms

Landing and moving on a disc

Wheel Conservation of Angular Momentum Demonstration and Solution

CP A small block on a frictionless, horizontal surface has a mass of 0.0250 kg. It is attached to a massless cord passing through a hole in the surface (Fig. E10.40). The block is originally revolving at a distance of 0.300 m from the hole with an angular speed of 2.85 rad/s. The cord is then pulled from below, shortening the radius of the circle in which the block revolves to 0.150 m. Model the block as a particle. (c) Find the change in kinetic energy of the block.

Angular Momentum Demo: Spinning Bottle

8 AWESOME EXAMPLES Conservation of angular momentum!!!

Anderson Video - Rotational Energy

Two astronauts, both 80 kg, are connected in space by a light cable. When they are 10 m apart, they spin about their center of mass with 6 rad/s. Calculate the new angular speed they’ll have if they pull on the rope to reduce their distance to 5 m. You may treat them as point masses, and assume they continue to spin around their center of mass.<img src="https://static.studychannel-prd.pearsonprd.tech/courses/physics/thumbnails/images/bfc6e006"alt=""/>

Suppose a diver spins at 8 rad/s while falling with a moment of inertia about an axis through himself of 3 kg•m2. What moment of inertia would the diver need to have to spin at 4 rad/s?&nbsp;BONUS:How could he accomplish this?

Star collapses

A large wooden turntable in the shape of a flat uniform disk has a radius of 2.00 m and a total mass of 120 kg. The turntable is initially rotating at 3.00 rad/s about a vertical axis through its center. Suddenly, a 70.0-kg parachutist makes a soft landing on the turntable at a point near the outer edge. (a) Find the angular speed of the turntable after the parachutist lands. (Assume that you can treat the parachutist as a particle.)

Anderson Video - Conservation of Angular Momentum

CP A small block on a frictionless, horizontal surface has a mass of 0.0250 kg. It is attached to a massless cord passing through a hole in the surface (Fig. E10.40). The block is originally revolving at a distance of 0.300 m from the hole with an angular speed of 2.85 rad>s. The cord is then pulled from below, shortening the radius of the circle in which the block revolves to 0.150 m. Model the block as a particle. (d) How much work was done in pulling the cord?

Angular Momentum  - Clay Puck and Stick Collision

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15. Rotational Equilibrium

17. Periodic Motion

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28. Magnetic Fields and Forces

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Jumping Into/Out of Moving Disc

Intro to Angular Momentum

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Angular Momentum of a Point Mass

Opening/Closing Arms on Rotating Stool

Angular Momentum of Objects in Linear Motion

Angular Momentum & Newton's Second Law

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