Embroidery Hoop and Pen

 

Code Number: 1F20.36

Demo Title: Embroidery Hoop and Pen

Condition: Excellent

Principle: Inertia of Mass

Area of Study: Mechanics

Equipment: 

Milk bottle, embroidery hoop, marker or pen.

Procedure:

Balance the embroidery hoop over the mouth of the milk bottle.  Place the pen on the top of the hoop directly over the mouth of the bottle (Positions are marked on the hoop).  With a sweeping motion snatch the hoop out from under the pen.  The pen will fall into the milk bottle.

References:

  • Martin Gardner, "Bottle, Hoop, and Dime", TPT, Vol. 32, #2, Feb. 1994, p. 80.
  • Martin Gardner, "Bottle, Hoop, and Dime", Science Tricks, p. 39.
1F20.36 - Embroidery Hoop & Pen