2. Writing Prompt – 5 sentences
Choose one: The Bill and Melinda Gates Foundation hires you as a consultant to determine how best to use $20 billion to save the world. What’s your plan? or Should cameras on drones watch all public spaces to prevent crime, or is that a violation of privacy?

3. Do Now -in your journal
If someone asked you to explain what “force” was, how would you explain it to them? Example: It took a lot of force to open that door. What kind of forces do you experience day to day?

4. Do Now
If someone asked you to explain what “force” was, how would you explain it to them? Example: It took a lot of force to open that door.

5. Check-in
Explain what inertia is (in your own words) to your shoulder partner and what it has to do with force.

6. Combining forces
Usually, more than one force is exerted on an object at the same time.
The sum of all forces acting on an object is called the net force.
You need to look at the net force in order to figure out if or how an object will move.

7. Balanced Forces Net force = zero No change in motion
(object is not moving)
List 3 examples of balanced forces:
Paper on desk
You in the chair
Flag not moving

8. Unbalanced Forces There is a net force acting on an object.
Causes a change in motion
Possible to add the forces together to find the size & direction of the net force.

9. Unbalanced forces
If the forces are moving in the same direction, add the forces.
Example:
Girl pushes 25 N to the right
Boy pulls 20 N to the right
Net Force = 45 N to the right
The piano moves to the right

10. Unbalanced forces
If the forces are moving in opposite directions, subtract the forces.
Example:
Dog #1 pulls 10 N to the left
Dog #2 pulls 12 N to the right
Net Force = 2 N to the right

11. Check-in (turn and talk)
How do you know whether to add or subtract forces? What does it mean if you get an answer of 0 Newtons?

12. You Try It: Calculating Net Force

13. You Try It: Net Force

14. You Try It: Net Force

15. Sample Test Question #1 Answer: D
Each box has the same magnitude of force (3 N), but in 3 different directions.
That makes them totally different from one another.
D is the only possible answer.

16. Sample Test Question #2 Answer: A
The box will move 30 N downward & 10 N to the left

17. Draw this in your little book in “additional notes”

18. Work on the practice problems in your journal
Work on the practice problems in your journal. Do not write on the paper.
Show your work.