1. Simple Machines, Power and Work

3. In Your Notes

4. What is a Simple Machine? Simple: easy to understand; not complex Machine: a device that transfers force or motion Simple Machine: Any of the following six devices: pulley, lever, inclined plane, wedge, screw, and wheel and axle

5. Pulley Uses grooved wheels and a rope to raise, lower, or move a load

6. Lever A stiff bar that rests on a fulcrum which lifts loads

7. Inclined Plane A slanting surface that connects a lower level to a higher level

8. Wedge An object with at least one slanting side and a sharp edge, which cuts material apart

9. Screw An inclined plane that wraps around a pole, which holds material together or lifts materials

10. Wheel and Axle A wheel with a rod, called an axle, that lifts or moves materials

11. All Six Simple Machines Discuss with your partner other examples of simple machines in action

12. Work A force that acts on a body, causing a displacement. Work=Force x Displacement Work is measured in joules

13. Power Amount of energy consumed in time Power = Work/Time Power is measured in watts