| Description |
Uncle Wonder show that a wedge is both a simple machine and inclined plane, and he uses the wedge to separate his logs. He also shows the boys and girls that a jackscrew which is used to life automobiles is also an inclined plane and a simple machine. Uncle Wonder shows us that screws are also inclined planes and tells boys and girls that he is going to make a birdhouse; and as the series progresses, he will show the birdhouse from time to time.
|
