Friction D. Crowley, Friction To understand what friction is, and how this affects movement Tuesday, August 04, 2015. Friction Dr. Lee Science Class. Chapter 5 Section 3. The Source of Friction The surface of ANY object is rough. Even smooth surfaces have tiny hills and valleys ...
A force is a push or pull that acts on an object A force can cause a resting object to move, or it can accelerate a moving object by changing the object’s speed or direction