The Shape of a Whirlpool
The shape of a whirlpool comes from two forces acting against each other. First, there’s the spinning of the water, which creates a force away from the center of the whirlpool. You can feel the same kind of force by swinging a ball in a circle on the end of a rope. In the case of the ball, the rope provides the second force, pulling the ball back into the center and keeping it from flying off in a straight line.


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