MECHANICS - MOTION IN TWO DIMENSIONS - CENTRAL FORCES	Order
Previous Next Penny on the Coat Hanger # 1D50.45
Description: This is another demonstration of central forces. The pail of water/pail of nails is easier to master (see number 1D50.40) Instructions: Balance a coin on the coat hanger as shown. Place the coat hanger on a finger and twirl. With care, the penny will remained balanced upon stopping. This takes some practice. The demoroom staff recommends 1D50.40 Hazards: Embarrassment and/or frustration without practice! Parts: One coat hanger One penny Purchased/Built: built Quant. in Demo Room: 1 Demo References The Video Encyclopedia of Physics Demonstrations Disc 05-18 A coin is placed on the flat of the hook of an elongated coat hanger and twirled around. Hilton M-16b.3 Place a coin on the coat hanger and rotate it about the finger. Sutton M-155 The wire coat hanger is whirled about the vertical plane by the hook without dislodging the dime on the middle of the lower bar. The Physics Teacher TPT 15(1),46 A penny is balanced on the hook of a coat hanger. The coat hanger is twirled around your finger and the penny doesn't fly off. The American Journal of Physics AJP 40(5),776 Place a penny on an elongated coat hanger and rotate around your finger.
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