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TRICK #3: The Floating Dollar Trick and The Rubber Band Reel
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Short Description: magic trick, as well as using the reel to create a new trick. In What's Going On . Here?, they are introduced to the scientific concepts of potential and ...
Content Inside: TRICK #3: The Floating Dollar Trick and The Rubber Band Reel Teacher’s Guide Overview of the Trick: Two “volunteers” are standing opposite one another in front of the magician. The magician borrows a dollar bill from one of them and crumples it up. He then opens his hand and the crumpled bill appears to float is air. How the Trick Works: (Do not reveal this to students until after they have proposed their own explanation for the trick.) Before performing the trick, the Magician enlists two “volunteers” to assist with the trick. One of them carries a hidden reel of fine plastic line. When they come to the front, the one with the reel attaches the end of the line to an object or his partner so that the line is reeled out in front of the Magician, as he diverts the audience’s attention. When the Magician crumples the dollar bill, he actually folds it over the line as he crumples it, so that when he removes his hand the dollar appears to be floating. Lesson Focus: Conversion of Potential Energy to Kinetic Energy Lesson Synopsis: Students create a Thread Reel and duplicate the observed magic trick, as well as using the reel to create a new trick. In What’s Going On Here?, they are introduced to the scientific concepts of potential and kinetic energy and apply the principle of converting potential energy in wound up rubber bands to kinetic energy by creating and altering the design of a “rubber band racer”. As a Math Connection, they graph the relationship between number of turns and distance traveled. Related National Science Education Standards: Content Standard B (Physical Science): As a result of their activities in grades 5-8, all students should develop an understanding of Properties and Changes in Properties of Matter. Fundamental concepts and principles that underlie this standard include: A substance has characteristic properties… As a result of their activities in grades 5-8, all students should develop an understanding of Motions and Forces. Engineering Magic Trick 3 – Floating Dollar/Rubber Band Reel Copyright ASME International 2002
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