1. By: Randee N. Cassandra O.

2. 9 inch White or Clear Balloon A penny, dime, nickel, quarter, or even a hex nut

3. Penny continues to stay in motion for quite a while (Newtons 1 st Law) It continues in a circular motion because of centripetal force and also because of the shape of the balloon Eventually slows down because of minimal friction

4. Law of Inertia An object in motion stays in motion unless acted upon by an unbalanced force

5. Centripetal Force Center-seeking force that is always directed toward the center of the circle Responsible for keeping the penny moving in a circular motion inside the balloon

6. Spinning Penny Experiment: Steve Spangler Science http://www.stevespanglerscience.com/experiment /00000054 Newtons First Law: The Physics Classroom http://www.physicsclassroom.com/class/newtlaws /u2l1a.cfm http://www.physicsclassroom.com/class/newtlaws /u2l1a.cfm Centripetal Force: http://hyperphysics.phy-astr.gsu.edu/hbase/cf.html