IDEAS/OPTIONS

DEMO: make fire with firedrill

DEMO: Place two repelling magnets on overhead projector. Push one toward the other, and see it slides away not smoothly, but in short steps due to the difference between the coefficients of static and kinetic friction.

 

CONTENT NOT ON NOTES PAGE

 

DEMO: rub block on table; image with thermal IR camera to see the generated heat

DEMO: force probe pulling a weight across the table. Applied force gradually increases, reaches max value before dropping to a lower constant force needed to move block with constant speed.

DEMO: normal force by electronic scale. Tilting the scale reveals reduced normal force.

JOKE: Q: Two cats are on a roof. Which slides off first? A: The one with the      smaller mew (mu).