Re: Inertia Demos

[herbgottlieb@juno.com]

Donald's suggestion for explaining tablecloth jerking 
demos as examples of impulse and momentum
rather than inertia is excellent.

Another good example of an impulse-change-of- 
momentum demo is the old one of pitching a 
raw egg into a loosly held vertical bed sheet.

The egg will not break since the force of the 
bed sheet is applied over an extended time.

Herb Gottlieb from New York City
(Where eggs break after they are stopped by the sheet and 
then fall to the hard floor below)