The Experiment: Spin Art and Centripetal Force In this activity, students place a paper disc on a rotating platform (like a salad spinner or a motorized motor). As the disc spins rapidly, they hold markers against the paper. The Scientific Concepts Centripetal Force: When the disc spins, the friction between the marker tip and the paper, combined with the rotation, pulls the ink outward or holds it in a circular path. Rotational Motion: Because the disc is moving at a high sp