Grade
3-4
Christopher Lampton
Seesaws, Nutcrackers, and Brooms: Simple Machines That Are Really Levers
Paperback
(Millbrook Press March 1, 1991)
Explains the concepts of simple and complex machines and mechanical advantage, and describes levers, including crowbars, can openers, and wheelbarrows, and how they work
- ISBN
- 1878841432 / 9781878841438
- Weight
- 19.2 oz.
- Dimensions
- 7.5 x 0.2
in.