Understanding Inertia Using Eggs

You probably know that by spinning an egg, you can find out if it is raw or hard-boiled. But did you know that if you stop a spinning raw egg for a second with your finger and release it, it continues spinning for a little bit? A raw egg has two main parts: a hard shell and the liquid inside. So when we start turning the egg, the inner part does not want to move, it resists that change, making it challenging to begin spinning the egg. The same thing is happening when we are stoping the egg: we are stoping the shell, and the liquid inside keeps on turning. This resistance to change of movement is called Inertia!