3Stack the toilet paper tube on top and center it as well.
4Finally, balance the egg on top of the toilet paper tube.
5Use the palm of your hand to knock the plate away.
Tip:Don't hit the tube or the cup.
How It Works
As the egg sits on top of the stack, the forces acting upon the egg are balanced. Gravity pulls the egg down while the tube pushes it up, so the egg is not in motion. When we remove the plate and the tube, the force that was holding the egg up is suddenly removed and the only force on the egg is gravity—causing it to move down.
Check out the Full Lesson on Balanced & Unbalanced Forces!
In this lesson, we learn that:
Force has both strength and direction.
Unbalanced forces cause an object to change its motion.