2. FORCE The FORCE is strong with this one… http://www.youtube.com/watch?v=R55e-uHQna0

3. FORCE A FORCE is a push or a pull on an object

7. Heavy load light load

8. FORCE The heavier an object is, the more force you will need to move it

9. Types of forces

10. gravity

13. MAGNETISM A force that causes a magnet to attract or repel objects

15. FRICTION A soccer ball rolling on the grass stops because of friction

16. FRICTION On a wet or icy surface, there is less friction, and people slip easily

17. FRICTION

18. Friction can sometimes produce sound and heat energy

19. A car will skid more on a wet road than on a dry road. This happens because between the tires and the dry road, there is more — A gravity B magnetism C friction D heat

20. A car will skid more on a wet road than on a dry road. This happens because between the tires and the dry road, there is more — C Friction Friction is a force that cause objects to slow down or stop. Wet road are slippery and have less friction.

21. Think about what types of forces are present in the video clip… CLICK ME!

22. position Motion happens when an object changes position—move from one point to another MOTION

23. All changes in motion are caused by FORCES

24. MOTION When you turn the handle bars, you are using a force to change the bike’s direction FORCE CHANGES MOTION

25. MOTION FORCE CHANGES MOTION When you pedal your bike harder, you are using more force and your bike goes faster

26. When you put on the brakes, friction is the force that slows your bike down MOTION FORCE CHANGES MOTION

28. You can describe the speed of a moving object

29. Speed tells how fast an object is moving

30. That means it moves a distance of 50 miles in one hour A car might travel at a speed of 50mph

31. An increase in an objects speed during a period of time