1. Forces

2. Force: A push or pull
Motion occurs when there is an application of unbalanced forces.

3. Demo 1
Why did the paper behave like it did?

4. Air Resistance is a fluid friction.

5. What direction does air resistance act on a falling object?
Opposite direction of the force of gravity.
Opposite of the direction of motion

6. Demo 2
Which paper falls first?
Why?

7. What are the factors that affect wind resistance?

8. Demo 3
So if size and shape are more important, why does the whirlygig fall slower?

9. Which force is the strongest?

10. What would their motions be like if air resistance were absent?