Pulleys and Gears (Machines Inside Machines)

by WendySadler (Author)

• Used

  Paperback
  2006

  $3.57

  What kind of pulleys do mountain climbers use? How do gears help cars and buses work? Why do weightlifters need pulleys to help them train? Take a close look at some Machines Inside Machines! Simple machines can be found all around us and help us do lots of different things. We use them in the house, in the garden, at school and even when we play. Machines Inside Machines includes: Close-up photographs with arrows and labels to help explain how simple machines work, Exciting activities to try out at home or at school, Information about the features of machines that makes them so good at what they do.

• Used

  Hardcover
  2005

  $3.57