Summary
Paint applied to a rapidly spinning surface spreads out to make a cool looking pattern.
Background
A spinning body experiences a centripetal force from the center to the edge. The faster the spinning the more the force. Paint moves because of the forces. Forces increase towards the edges.
Materials
- DC Motor
- Variable Power supply
- wood or metal support box
- thin plywood *8x8
- squeeze bottle tempura paints
Directions
- Mount a DC motor in a box or metal can so the axis points up.
- Connect the motor to variable voltage power supply
- Mount a piece of thin plywood on a wooden block that is pressed on to the motor shaft.
- Attach a piece of paper to the wood with double sticky tape.
- Spin it up and squirt colored paint onto the paper, increase the power to make it go faster.
Sources
Grade
