Drehstuhl / Revolving Chair

Stations-ID: D081

Instructions:

Sit on the chair and turn.

Spread your arms or pull them in close to your body.

To amplify the effect, use the weights.

• What happens when you pull your arms in close while the chair is rotating?

• What happens when you spread them?

• Ask a partner to sit in the chair and hold the weights.

Set the chair in motion. Repeat the experiment, this time your partner spreads his arms.

This experiment dates back to the physics professor Robert Wichard Pohl (1884 – 1976). To transmit basic physical knowledge not only theoretically, but also practically, he developed various demonstration experiment, which are still an integral part of university practicals and lectures.

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