1. Warm-up Get your green folder out
Label a new page “ Force and Motion Notes”
Underneath your new title write the definition for force
Turn to your vocabulary page

2. Vocabulary
-Reference Point- the starting point you choose to describe the location or position of an object
-Position- describes an objects distance and direction from a reference point
-Displacement- the difference between the initial or starting position and the final position
-Motion- the process of changing position
-Speed- the distance an object moves in a unit of time
-Velocity- the speed and the direction of a moving object
-Acceleration- a measure of how quickly the velocity of an object changes

3. Objective 6.8 Changes in Force and Motion
The student is expected to identify and describe the changes in position, direction, and speed of an object when acted upon by unbalanced forces

4. What is a force? How do forces combine? How do forces affect motion?

5. What is a Force? In science, a force is a push or a pull.
All forces have two properties:
Direction and Size
A newton (N) is the unit that describes the size of a force.

6. How do Forces Combine? More than one force often acts on an object.
You can determine the net force on an object by combining the total of all the forces acting on it.

7. Forces in the Same Direction
When forces are applied in the same direction, they are added to determine the size of the net force.

8. Forces in Different Directions
When two forces act in opposite directions, you subtract the smaller force from the larger force to determine the net force.
The net force will be in the same direction as the larger force.

9. Balanced and Unbalanced Forces
When the forces on an object produce a net force of 0 N, the forces are balanced.
There is no change in the motion of the object.

10. Balanced Force Example
The student is pushing down on the chair, but the chair does not move.
The floor is balancing the force by pushing on the chair.

11. Balanced and Unbalanced Forces
When there is an amount of net force on an object and it is not 0 N, the forces on the object are unbalanced.
Unbalanced forces produce a change in motion of an object.

12. Balanced and Unbalanced Forces