"Presents information on simple machines with a focus on pulleys. Explains what a pulley is, how pulleys work, and includes examples of past and present uses. Intended for third to fifth grade students"--Provided by publisher.

Includes index.

What is a pulley? -- Push and pull -- Uplifting machines -- Foiled by friction -- Single pulleys -- Pulling together -- History on the ropes -- Gaining an advantage -- Surfing simple machines -- Science in action -- What have you learned?.