1. Forces: Balanced, Unbalanced, and Net Force
Mrs. Gergel and Ms. Khericha

2. What is force? How do we measure it?
A force is a push or a pull on an object.
Arrows called vectors show a force’s
Magnitude (strength)
Direction

3. Net Force
Net force is all of the forces acting on an object.

4. How to find Net Force To find net force:
If the forces are in opposite directions, find the difference between them (Subtract the smaller number from the larger number).
4N N
Net force: ________

5. How to find Net Force Net Force: ______
If the forces are in the same direction, add them.
4N N
Net Force: ______

6. Balanced and Unbalanced Forces
If the net force is zero, the forces are balanced and no change in speed or direction will occur.
3N N
Net Force:

7. Balanced and Unbalanced Forces
If the net force is greater than zero, the forces are unbalanced and the speed or direction will change in the direction of the net force.
3N N
Net Force:
What direction?

8. Practice
Balanced or unbalanced?
Who is going to get hit by the ball?

9. Practice
5 N
5 N
Balanced or unbalanced?
Will it move?

10. Practice
Balanced or unbalanced?
Which direction will it move in?

11. Practice Balanced or unbalanced? Which direction will it move in? 10 N

12. Practice
20 N
10 N
Balanced or unbalanced?
What is the net force?

13. Practice Balanced or unbalanced?
What is the net force? 10 N to the right

14. Practice
30 N
5 N
Balanced or unbalanced?
What is the net force?

15. Practice Balanced or unbalanced?
What is the net force? 25 N to the left

16. Practice
7 N
7 N
Balanced or unbalanced?
What is the net force?

17. Practice
7 N
7 N
Balanced or unbalanced?
What is the net force? 0 N