Rotation about the center of mass: Object to throw.

Rotation about the Center of Mass: Object to throw. Toss dumbell and see that the Center of Mass is not at the middle of the rod. In a dark room, turn on the LED light, and toss the twirling dumbell forward and up. The students will see the light at the center of mass perform a smooth parabolic trajectory.
UCB Index: 
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Demo Diagram: