1. Chapter 5 Newton’s Second Law of Motion – Force and Acceleration

2. Acceleration = change in velocity
Time Interval
Net force – combination of all forces acting on an object
Acceleration depends on net force
If the net force on an object is 0. The object will stay at rest or stay at a constant velocity (Newton’s First Law)
If there is a net force acting on an object that is greater than zero, it will experience an accleration
The acceleration of an object is directly proportional to the net force:
acceleration ~ net force

3. Acceleration = ____1____ mass Acceleration = ____net force____ a = F M

4. Friction There are several different kinds of friction:
Static Friction
Sliding Friction
Rolling Friction
Fluid Friction
We will only focus on Static Friction and Sliding Friction

5. Static Friction – is the friction between two surfaces in contact with each other if they are at rest (FS)
Sliding Friction – is the friction between two surfaces in contact with each other if they are moving (FK)
Ff = μ x FN

6. The normal force (support force) will always act perpendicular to surface in contact: