To understand what happens when simple machines work together, one has to know the basic things they all do separately. The concepts of input and output, work and mechanical advantage are illustrated through clever animation. “Excellent. Our students were unanimous in their recommendations for purchase.” — School Library Journal.
Part of “Intermediate Simple Machines,” a five-part series starring Zog, an animated cavemen who cleverly clarifies and demonstrates the benefits of simple machines. A Coronet release. Produced by David Christianson.
12 minutes • Color