1Q60.36 - Spinning Eggs

Code Number:
Demo Title:
Spinning Eggs
Torque & Stable Axis
Area of Study:
Paraffin and water filled plastic eggs.

The green egg is the paraffin filled one.  The yellow and pink eggs have water in them of different amounts.

When spun the paraffin filled egg will spin very well and may even turn so that it spins on its end.  The water filled egg will not spin easily.  Also, if you spin the water filled egg rapidly, and then stop it and quickly release it, it will start to spin again because the water had not stopped rotating.

Spin the egg so that it spins in an upright orientation.  Then pick up the plate and by tilting and rotating the plate you can keep the egg spinning indefinitely.

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  • Jearl Walker, "1.107, Spinning Eggs", The Flying Circus of Physics Ed. 2, p. 53.
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  • Julius Sumner Miller, Q31 & A31, Millergrams I – Some Enchanting Questions for Enquiring Minds, p. 29 & 87.

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