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.

Keyword Search:
complete words only, or parts of other words?

Home Manual Demo Suggestions

NCSU Physics Demonstrations
© 2010, North Carolina State University Department of Physics. The design of this site nor the
contents may be copied without the express written permission of the NC State University Department of Physics.

North Carolina State University
All Rights Reserved, 2011