It's All In The Wrist

This is an activity about circular motion. Learners will explore the laws of motion and force by observing circular motion. All you need to do this activity is a clear balloon, a penny and a marble, and several jars or cups of varying sizes and shapes. Also included are links to other excellent physics sites. [Activity is publicly available through a web crawler capture on Archive.org. Activity write-up only, images are unavailable.]