Coins

 

Code Number: 1Q60.85

Demo Title: Balancing - Spin a Penny

Condition: Good

Principle: Dynamic vs. Static Balancing.

Area of Study: Mechanics

Equipment: 

Coins

Procedure:

Put the coins edge up on the table and spin them.  When they slow down and fall onto the table they should show heads about 80 % of the time.

References:

  • Robert Ehrlich, "4.9, Spinning a Penny", Why Toast Lands Jelly-Side Down", p. 72.