This title is suitable for children of ages 7 to 8 years. Get ready to learn all about inclined planes in this fascinating book! See inclined planes at work in ramps and roller coasters, as well as their other applications and history. Kids get a hands-on approach to inclined planes in the exercise section, making and using their own inclined planes. Это и многое другое вы найдете в книге Get to Know Inclined Planes (Get to Know Simple Machines) (Jennifer Christiansen)