Have you ever wondered how seesaws go up and down or how screws stay secure in walls?
In the How Do series, readers are welcome to guess along with the rest of us--and then explore the science behind the right answers. Beginning concepts of mechanical engineering are explored through diagrams, photos, and informative and engaging text.
In How Do Seesaws Go Up and Down?, readers will learn:
- How various simple machines work, including inclined planes, screws, pulleys, wheels and axles, and wedges
- Introductory concepts of mechanical engineering