Cycloid disk draws path on chalkboard.
1D10.20 • A+55+10

The Cycloid Disk: Draws Cycloid Path on Chalkboard. Chalk fits in the notch on the outer rim of the disk. As the disk rolls to the right, the chalk traces out a cycloid path.
1D10.20 • A+55+10

The Cycloid Disk: Draws Cycloid Path on Chalkboard. Chalk fits in the notch on the outer rim of the disk. As the disk rolls to the right, the chalk traces out a cycloid path.