Defines a pulley and shows how it is used in everyday life.

Defines pulleys, explains their functions, and suggests simple experiments to demonstrate how they work.

Uses everyday examples to describe pulleys as simple machines that make lifting, pulling, and moving easier.

"Popular cartoon character Fred Flintstone explains how pulleys work and how he uses simple machines in his daily life"--Provided by publisher.

Introduces the principles of pulleys and gears as simple machines, using examples from everyday life.

"Describes different jobs that levers and pulleys can do and how they are able to do them. As readers use scientific inquiry to learn about how force, energy, and work make using these simple machines possible and effective, an activity based on real world situations challenges them to apply what they've learned in order to solve a puzzle"--

Defines ramps and wedges and shows how they are incorporated into more complex machines.

An introduction to six simple machines--the lever, the inclined plane, the screw, the wheel and axle, the wedge, and the pulley--and their use in more complex machines such as derricks, bulldozers, and metal lathes.

An introduction to the concepts of forces, work and how machines are used to make work easier.