Using a sled race, students test how different surfaces affect the sliding motion of an object.
After completing this tutorial, you will be able to complete the following:
Friction is the force that opposes motion. This occurs when one surface comes into contact with another surface. Friction occurs with any moving object; there are no frictionless environments. Even when something appears smooth, such as glass or ice, on the microscopic level, it is still rough enough to impede motion. For example, if you roll a ball across a frozen lake, friction will eventually slow the ball until it stops. Without friction, it would roll indefinitely. Surfaces that are rougher, such as sandpaper, slow down objects even more rapidly. The rougher a surface, the more friction will occur.
|Approximate Time||25 Minutes|
|Pre-requisite Concepts||Students should be familiar with these concepts: effects of force on motion, identification of different surface types, and motion.|
|Type of Tutorial||Concept Development|
|Key Vocabulary||distance, effects of force, effects of friction|