In a rotating environment (frame of reference), an object moves faster if it is farther from the axis of rotation (it moves in a bigger circle). If this object moves towards or away from the axis it will seem to be pushed to the side due to the difference in speed between its original position and its new position. This fictitious sideways force is called the Coriolis force. To see its effects on a plaground merru-go-round, press the button below.

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