Centrifugal Forces…

When you swing a  rope around, the loose end will try to fly away, or “escape”. Put a ball on the end of a rope and do the same and the ball will try to fly away from you.

By holding the rope you pull back on the CENTRIFUGAL force of the weight. Your pulling is called centripetal force. When you let go the Centrifugal force makes the weight fly away…

Look at the diagram or sketch below.

The arrow V is the velocity or speed of the ball going around in a circle. The faster the speed, the larger both forces.

And here you are in a merry-go-around. The centrifugal force pushes the children and their seats out and up, scary…

But, the seats are on a chain and the chain pulls back with the centripetal force and keeps you safely going around and up!

And a figure skating pair is using centrifugal force when one partner  is swung around by her partner at the center.

In our CENTRIFUGAL TOY, you move the bowl in small circles with your hand and arm, and the marble starts running around at a fairly high speed, its centrifugal force presses it against the wall of the bowl, and this keeps the marble in its orbit! BUT, the marble tries to make the largest circle possible and therefore climbs up the wall of the bowl!

Stop your driving motion and the marble will come down, it descends and comes to a standstill at the bottom.

The Centrifugal Force toy…at standstill

Why does the marble not fly out of the bowl?

Because your tape forms an edge and the marble keeps running against this edge and can not escape; AT LEAST MOST OF THE TIMES. If it does, you retrieve it and start over again,

As long as you hold the bowl horizontal, you can spin the marble as fast as you can!