Purchase: ... This video resource is designed to provide a basic introduction to gears suitable for grades 4 to 9. Gear rotation, gear ratio, rates of rotation, mechanical advantage and examples of use are included. A second video,
by lacefromireland
by Susanne Sommer
by Shakeel FYM
by Lan Anh Handmade
by Nidhi's MehndiART
by Alexis Winslow