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Curve Ball
# 2C20.60

Description: A Trac-Ball set is used to spin a Styrofoam ball while throwing it. Place the ball in the lower end of the track. Throw with a quick motion, keeping the track in a vertical plane for upward deflection. The track should be nearly vertical when the ball leaves it. This takes a little practice.

Purchased/Built: purchased

Setup Time: none

Quant. in Demo Room: 1

Source: K-Mart

Demo References
Sutton M-297 A mailing tube lined with sandpaper helps give spin while throwing curve balls.
The Video Encyclopedia of Physics Demonstrations Disc 13-03 Throw a styrofoam ball with a throwing tube. Animation.
Sutton M-299 A half round stick used as a propeller will rotate in either direction given a start.
Meiners 17-2.12 A "V" shaped launcher lined with styrofoam is used to launch curved balls.
Freier and Anderson Fj-3 A ping pong ball is thrown with a sandpaper covered paddle.
The Physics Teacher TPT 3(7),320 Throw a 3" polystyrene ball with a "V" shaped launcher lined with emery cloth.

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