Help students to investigate the force on an object in circular motion with this convenient kit. Through a series of simple demonstrations, students will better understand the relationship between the radius of the circular motion, the velocity of the moving object, and the external force required to maintain the motion. An activity guide is included. Contents: Rubber stopper attached to cord approximately 1m in length Plastic tube with beveled ends Hanging mass set: 12 aluminum weights — 9 x 20g, 1 x 10g, 2 x 5g — and one 50g aluminum hanger Paperclip (position marker) Activity guide