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By: Randee N. Cassandra O.

By: Randee N. Cassandra O.

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By: Randee N. Cassandra O.

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  1. The Spinning Penny By: Randee N. Cassandra O.

  2. Material’s Needed • 9 inch White or Clear Balloon • A penny, dime, nickel, quarter, or even a hex nut

  3. Explanation • Penny continues to stay in motion for quite a while (Newton’s 1st 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. Newton’s First Law of Motion • Law of Inertia • An object in motion stays in motion unless acted upon by an unbalanced force

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