MECHANICS - NEWTON'S FIRST LAW - INERTIA OF REST NC State University Faculty Access

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Eggs and Pizza Pan
# 1F20.35


Description: Another classic demonstration of the inertia of rest. Coordination is needed to make sure you don't end up with egg on you face!

Golf balls are the default (eggs are optional - please supply your own).

Instructions: Place three beakers of water in a (roughly) triangle shape on the bench relatively close together. Place the pizza pan on top of the beakers, the cylinders on the pan (above the beakers!) and the eggs on top of the cylinders. Make sure this whole system is close to the edge of the bench, so the pan hangs of the edge a bit.

Stand on the bristles of the broom, pull the handle back, and let go of the broom to allow the handle to hit the edge of the pizza pan. With practice, the eggs will drop safely into the beakers of water.

Hazards: Spilled water and broken glass can result from a hit from the broom.

Parts: Three beakers with water
3 plexi-glass cylinders
3 golf balls
1 pizza pan
1 broom 3 Eggs (if used instead of the golf balls)

Quant. in Demo Room: 1

Demo References
The Video Encyclopedia of Physics Demonstrations Disc 02-16 Place a pizza pan on three beakers, place cardboard tubes on the pan directly above the beakers, and eggs on the tubes. Knock out the pizza pan.
Meiners 8-2.2 Egg on a spool, on a pie tin, on a beaker of water. Flex broom and knock out pie tin.

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