What Do Ramps and Wedges Do? (What Do Simple Machines Do?)

by David Glover (Author)

• Used

  Paperback
  2007

  $4.65

  Each book introduces a particular simple machine and then explores how it is used in different and increasingly complex gadgets and machines.

• Used

  Paperback
  1997

  $4.64

  Looking at ramps and wedges, this is one of of a series which aims to develop children's knowledge of the basic principles of design and technology. Each book introduces a particular principle and explores how it is used in different gadgets and machines.

• Used

  Hardcover
  1996

  $6.68