PURPOSE: To illustrate dramatically centripetal force and centrifugal reaction.

DESCRIPTION: Put some water in the bucket and rotate the bucket in a vertical circle over your head. The centripetal force provided by your arm keeps the water bucket moving in a circle, while the centrifugal reaction keeps the water in the bottom of the bucket, as long as the rotational velocity is sufficient.

SUGGESTIONS:

REFERENCES:

EQUIPMENT: Bucket with water.

SETUP TIME: None.

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