What you need:
Two clear plastic glasses, two small plastic balls of different colours and a broad transparent adhesive tape
What you do:
Place the two plastic balls inside one glass.
Keep the second glass on top of the first glass and seal the rims carefully with the tape. Alternatively, you can glue them together with a strong rubber=-based adhesive and let the glue dry.
Place the model horizontally on the table and give of a spin.
What do you see?
The balls fly out in opposite directions towards the bases of the glasses.
Why does this happen?
Centrifugal force acts on a body moving in a circular path. It draws the rotating body away from the centre of rotation.
In the model, the rims of the glasses serve as the rotating centre. When you spin the model, the balls moves away from the centre towards opposite directions due to centrifugal force.
Centrifugal force is the basic principle that operates the spin cycle in a washing machine. It is also the force that makes you feel as if you will fall out from a spinning merry-go-round.
Picture Credit : Google
