Mobiles: Building and Experimenting with Balancing Toys
Seals balance balls on the ends of their noses. Ballerinas balance their bodies on the tips of their toes. And mobiles hang perfectly because they, too, balance. Learn all about the scientific principles that allow a gymnast to perform incredible tricks on the balance beam and an acrobat to walk easily across a thin wire. Illustrated.
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20 inches long adding nails affect the balance Alexander Calder amount of weight balance objects balance the cardboard balance the model balances horizontally balances vertically balancing point Boston Children's Museum bottom piece broomstick Building and Experimenting C-clamp cardboard balance cardboard rotates cardboard vertical center point Challenges and Experiments change the balance changing the position coat-hanger wire dowel drinking straws edge Experiments to Try farther floor hanging pieces help you understand hidden nails hip pieces hole inches wide keep the cardboard larger piece lines of symmetry long 1 piece main beam masking tape midpoint moving the rubber number of nails optical illusions paper clip piece as shown piece of coat-hanger piece of string pieces of cardboard place the nail rectangle remain balanced seesaw side smaller pieces stack sturdy wire symmetrical objects tilt top piece toy balance beam Try to balance unsymmetrical What's Happening wide and 20