2. Forces What is a Force? Push or Pull What does it do? Causes Motion How do we describe it? Size (magnitude) Direction

3. What are the 7 simple machines? Lever Inclined Plane Wedge Screw Wheel and Axle Gear Pulley

4. Why do we use simple machines? To make life easier! Simple Machines change forces: change the direction change the size change both

5. How do they work? Conservation of Energy Work and Energy are related Scientific Definition of Work Work = Force x Distance distance in direction of force

6. Lever

7. Incline Plane

8. Wedge

9. Screw

10. Wheel and Axle

11. Gears

12. Pulley Change Force Direction Same Force Size