1. Friction

2. Friction….. is a force that resists motion.
occurs when two objects are pushed or pulled against each other.
acts in the direction that is opposite of motion.

3. The strength of friction depends on:
How hard the surfaces push together
The types of surfaces involved

4. 4 Types of Friction: Static: acts on objects that are not moving
Sliding: occurs when two solid surfaces slide over each other
Rolling: occurs when an object rolls across a surface
Fluid: occurs when a solid object moves through a fluid