Concept
Friction is a force that opposes motion. Rolling, sliding and air resistance are three kinds of friction. Students will explore these concepts in classroom activities and later apply them to the movement of the a Soap Box Derby car.

Video Synopsis
Bridget and Austin go with Alex for a visit to the All-American Soap Box Derby headquarters in Akron, Ohio. On the way, Bridget sticks her hand out the window and first holds it against the wind and next turns it to cut the wind. Alex tells her she is experiencing the friction wind causes, just like in the Soap Box Derby. Whey they get to Derby Downs, they look at some of the old cars and compare their shapes.

Download the Teacher Guide (PDF file) Lesson begins on page 111.

Online Activities for Friction