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| 1 | Spinning wheel: Rotational kinematics |
| Description | Wheels are mounted on a vertical axis. In this experiment, we observe one of the wheels spinning while slowing down. |
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| 2 | Two wheels on an axle: Rotational collisions |
| Description | Two wheels that are mounted on the same (vertical) axis spin separately or together. Data for several cases is presented. In Experiment 2, one wheel spins alone. It is observed that its angular velovity decreases. In Experiment 4, the upper wheel spins, drops onto the lower one and takes it along. |
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3 | Breaking a flywheel mechanicalla and electrically |
Description | (1) A steel flywheel is mounted on a horizontal axis. It rotates and slows down because of friction. A belt is stretched over the wheel and held with different weights. Data of rotational speed for several cases is presented. (2) A steel flywheel is mounted on a horizontal axis. It rotates and slows down because of electrical breaking. The flyhweel drives a generator to which an electric load resistor has been connected. (A second generator attached to the wheel is used to measure the angular speed of the wheel.) |
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4 | Driving wheels apart with a spring |
Description | Two wheels are mounted on the same vertical axis. They can spin independently. Initially, they are at rest. A torsion spring between them drives them apart. In the first experiment, the wheels are identical. In the second, the upper wheel is thinner than the one underneath. |
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