Inertial Eggs Dyson Science DIY Project

Inertial Eggs

Use eggs to find out about momentum and changing direction. The fresh egg will start to spin again when the finger is released, while the other will remain at a dead stop. The fresh egg has egg fluid and yolk inside it which gains momentum. When the egg is momentarily stopped, the yolk continues to turn inside the shell. When it is released, the viscosity of the fluid between the still spinning yolk and the shell causes the shell to spin again.

Design icons

Inertia is the tendency of a moving object to remain moving or a stopped object to remain stopped. In engineering, flywheels are big, heavy wheels that are spun to gain inertia. The energy is stored and released to smooth out the operation of engines that have a short burst of power during their running cycle.


  • One hardboiled egg
  • One fresh egg – the fresher the better


Spin each egg, one hard boiled and one fresh, on a table.


Leave it to spin for a few seconds then momentarily stop it by placing your finger on top.


Release the egg and observe what happens next.

DIY Details


Avg. Duration

2 hours

Get Abakcus straight to your inbox

Recommend this DIY

Share on facebook
Share on twitter
Share on linkedin
Share on whatsapp

Similar DIY's

Invisible Ink Dyson Science DIY Project

Invisible Ink

Write your own secret message in an invisible ink solution. The lemon juice is an organic substance which reacts with oxygen in the surrounding air, oxidizes and turns brown. By…
Colared Carnations Dyson Science DIY Project

Colared Carnations

Create multi-colored flowers. Plants need a transport system to move food, water and minerals around. There are two things that combine to move water through plants – transpiration and cohesion.…
Ivory Soap Dyson Science DIY Project

Ivory Soap

Create a big soapy marshmallow out of Ivory soap®. Ivory soap® floats because it has air pumped into it during manufacturing. When the air inside the soap heats up, the…
Dancing Raisins Dyson Science DIY Project

Dancing Raisins

Make raisins dance up and down in a glass of soda. Raisins have a higher density than the liquid in the glass, so they sink to the bottom. Carbon dioxide…
Scared Pepper Dyson Science DIY Project

Scared Pepper

Move pepper away from you without touching it. Water normally bulges up a bit. You can see this by looking at a raindrop or by filling a glass slightly over…
Fire Extinguisher Dyson Science DIY Project

Fire Extinguisher

Create your own invisible fire extinguisher. The mixture of baking soda and vinegar creates carbon dioxide. CO2 is heaver than air so it sits at the bottom of the glass.…
Send this to a friend