There's a good ball bearing activity in this book. - Vollis
  • Simple machines
  • Levers
  • Gears
  • Machine experiments

  • Machines
    by Janice VanCleave
    Published by John Wiley & Sons, Inc.
    ISBN 0-471-57108-3

    A collection of science projects and experiments exploring simple machines as levers and screws.

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