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INDEX B4: RIGID BODIES


B4.01 OFF-LOADED BOX

A box is loaded so that its center of mass is not at its geometric center. When thrown, the box wobbles, but the center of mass follows a smooth curve.

B4.02 INERTIA AND ANGULAR ACCELERATION

Weights move on a rotating rod, giving different angular accelerations for different moments of inertia.

B4.03 MYSTERY BATONS

Two batons are weighted to have different moments of inertia and different behaviors when rotated.

B4.04 SPINNING SKATER

The demonstrator on the rotating chair varies its moment of inertia by extending its arms and pulling them in.

B4.05 OFF-LOADED CYLINDER

A wooden cylinder is loaded so that its center of mass is not at its geometric center. When the cylinder is placed on the lecture bench it will start to roll.

B4.06 INCLINED PLANE RACES

Objects with different moments of inertia (e.g. sphere, hoop, cylinder) race each other down an inclined plane.

B4.07 FASTER THAN GRAVITY

A board is supported at an angle with a ball at the high end and a cup a bit further down. When the support is removed, the board falls, and the ball lands in the cup.

B4.09 METER STICK BALANCE

Weights hang from a meter stick, with balance depending on the masses and their distances from the fulcrum.


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