mechanical movements

"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.

"Presents information on simple machines with a focus on levers. Explains what a lever is, how levers 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 inclined planes. Explains what an inclined plane is, and includes examples of past and present uses. Intended for third to fifth grade students"--Provided by publisher.

Building Better Robots offers a cutting-edge, comprehensive look at one of science's biggest challenges. Includes a look at the history of the topic, recent breakthroughs, key facts to consider, and questions that remain unanswered.

Guide to making woodworking projects that move, whiz and whir, flip, and more.

Discusses what robots are and how they work. Also looks at different types of robots and their uses.

Explains what it means to balance, and looks at some of the things that balance on a construction site, including a sawhorse, ladder, scissor lift, and others.

Defines motion, describes its different types, and discusses how motion is used in bicycles, escalators, typewriters, and other types of machines.

Discusses movement, its importance for the survival of plants, humans, and other animals, and the various ways in which it is achieved.

Explains the laws governing all movement and describes how and why things move, with an emphasis on machines ranging from simple wheels to spacecraft.