1. Chapter 13 Section 1: Motion
Objective: Apply proper equations to solve basic problems pertaining to distance, time, speed, and velocity.

2. Distance and Displacement
Distance is a measure of the space between two locations
Displacement is the measure of the space between two locations measured along the shortest path connecting them.
Distance and direction

3. Relative Motion Reference point: nonmoving object
Relative motion: the position of an object described relative to another object.

4. Speed
Speed: the distance you traveled divided by the time it took to travel the distance.
Constant Speed: for an object traveling at constant speed, the object’s speed at any interval of time does not change.
Average Speed = Distance/Time _
V= d/t

5. Velocity
Velocity =Displacement /Time

6. Acceleration
Acceleration: the change in velocity divided by the amount of time required for the change to occur.
Speeding up, slowing down, or changing directions is considered accelerating

7. Chapter 13 Section 2: Forces and Motion

8. Force Force: a push or a pull that one object exerts on another object
Force has both a size and a direction.

9. Forces Combine
net force: the combination of all the forces acting on an object
Forces can combine in the same direction or the opposite directions.
Draw AND write the captions for figure 7 on page 404.

10. Balanced and Unbalanced Forces
Balanced forces: if the forces acting on the object have a net force of zero
Unbalanced forces: if the forces acting on an object do not have a net force of zero

11. Contact and Noncontact Forces
Contact forces: a force that is exerted only when two objects are touching.
Noncontact Forces: forces that are exerted on objects without touching.
Ex: gravity, magnetic forces

12. Gravity and Friction
Gravity: a noncontact force that every object exerts on every other object due to their masses.
Weight: gravitational force Earth exerts on an object
Mass: amount of matter the object contains
Friction: is a contact force that resists the sliding motion of two objects touching

13. Air Resistance
Air resistance: a contact force that opposes the motion of objects moving in the air