(Jon of the Clue Crew shows himself on the monitor, swiveling around in a chair with dumbbells in his hands, extending and contracting his arms.)  When I draw my arms inward, my angular velocity increases because my angular mass decreases; the product of those two quantities is called angular this
When the weights are brought inward, the moment of inertia decreases, and the... [DOC] [TLE] Swiveling Science: Conserving Momentum in a Spinning Chair ... [PAR] Take a spin in a chair to learn about conservation of momentum--and how figure 
skaters control ...