1. Forces!

2. What Is Force?

3. It takes a force to move something.

4. A force is a push or a pull . . .
that causes an object to move, stop, or change direction.

5. When you push an object, it moves away from you.

6. When you pull an object, it moves toward or with you.

7. Is this a push or a pull?

8. Is this a push or a pull?

9. Is this a push or a pull?

10. Is this a push or a pull?

11. Is this a push or a pull?

12. Is this a push or a pull?

13. Is this a push or a pull?

14. Is this a push or a pull?
What is the pulling force called?

15. Some Types of Forces Gravity Friction Magnetism
Erosion (wind and water)

16. Gravity

17. Gravity:
the force that pulls all objects in the universe towards each other’s center.

18. Gravity
The mass of an object determines how much gravity that object has. For example:
The moon and Earth are pulling on each other. The Earth is bigger than the moon so its gravitational pull is stronger. That is why the moon orbits the Earth. What would happen if the moon was bigger than the Earth?

19. Friction

20. Friction . . .
a force that acts against something when two surfaces rub against each other.

21. A softball player sliding into home on the rough dirt has a lot of friction and can stop.

22. A sled on smooth ice will keep sliding and is hard to stop because it has only a little friction.

23. What causes the leaves to fall to the ground during the autumn season?
gravity
push
magnetism
What causes the leaves to fall to the ground during the autumn season?
Magnetism
A pushing force
Gravity
Erosion

24. The moving of an object is called --
What causes the leaves to fall to the ground during the Autumn season?
gravity
push
magnetism
The moving of an object is called --
force
friction
magnetism
gravity

25. What causes the leaves to fall to the ground during the Autumn season?
gravity
push
magnetism
Which of the following is an example of a force that is different from gravity?
A. an apple dropping to the floor
B. a boy slamming a door
C. a leaf falling to the ground
D. water dripping from a faucet

26. What force is represented in the above picture?
What causes the leaves to fall to the ground during the Autumn season?
gravity
push
magnetism
What force is represented in the above picture?
A. A pushing force
B. A pulling force
C. A magnetic force
D. Both A and C

27. May the Force Be With You
Activity Stations

28. Station 1:Building a Card House
You must use build a card house using
All of the cards in the deck.
The house must be a minimum of 5 stories high
with 3 rooms on each floor.

29. Station 2: Marble Motion and Forces
Build a ramp and roll a marble down a ramp. At the end of the ramp the marble pushes a cup until it stops on graph paper.
Instructional Video

30. Station 3: Force and Friction Lab
Pull the following materials with the spring scale and record your information

31. The object is to not let gravity pull the marbles to the tray!
Station 4: Kerplunk!
The object is to not let gravity pull the marbles to the tray!

32. Station 5: FORCE MOTION AND FRICTION RAMPS
Use the 3 ramps to record how a toy car moves along different surfaces.