Levers in My World / Palancas en mi mundo
My World of Science / La ciencia en mi mundo
This helpful volume explains what levers are and how to use them. Readers will learn to identify the different parts of a lever--fulcrum, load and effort. The book also explains the differences between first-, second- and third-class levers and explains why a seesaw is a first-class lever, but a fishing rod is a third-class lever.
