mechanical movements

Descubra c?mo esta sencilla m?quina facilita la elevaci?n y la bajada de objetos. Aprenden sobre poleas fijas y m?viles y cu?ndo es mejor usar cada una.

Descubra c?mo esta sencilla m?quina facilita la elevaci?n, la reducci?n y la apertura de las cosas. Aprenden los tres tipos de palancas: de primera clase, de segunda clase y de tercera clase.

Contains step-by-step instructions and photographs for making some mini machine projects.

Illustrations and text describe the mechanisms used in hydraulics, steam engines, pneumatics, presses, horologes, and other machines from the first century to the Industrial Revolution.

This accessible book introduces readers to this simple machine and its many uses through real-world examples.

Readers will learn all about this important, simple machine through detailed pictures with thorough annotations.

This accessible book introduces readers to the lever through real-world examples.

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

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

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