1. Vocabulary of Instruction:
7th Grade
Unit 6:
Forces and Motion
Lesson 3:
Simple Machines
Vocabulary of Instruction:

2. Efficiency
Is the balance between the form of an object and its function.

3. Effort
Is the force applied to an object in order to get it to move.

4. Fulcrum
Is the place upon which a lever pivots ... the point that it swivels around... the object that it rocks up and down on, or back and forth around.

5. Inclined Plane
Is a simple machine or mechanical device which reduces the effort needed to raise an object by increasing the distance that it moves.

6. Input
Is the place where the power is entered into the system.

7. Joule
Is a metric system unit used to measure energy.

8. Lever
Is a simple machine in the form of a plank or bar that pivots on a fulcrum.

9. Load
Is an object or something that must be moved or supported.

10. Mechanical Advantage
Is the upper hand you gain when you use a mechanical device or machine to help you multiply the amount of force you can transmit.

11. Newton
Is a unit used to measure force.

12. Output
Is the point where the power comes out of a system.

13. Pulley
Is a simple machine in the form of a wheel with a groove around the edge.

14. Resistance
Is the tendency of a material to resist electric current passing through it or a force that opposes motion.

15. Screw
Is a simple machine in the form an inclined plane consisting of a spirally threaded cylindrical rod.

16. Wedge
Is a simple machine in the form of an inclined plane.

17. W = F x d
The work done (W) is equal to the applied force (F) multiplied by the distance (D) the object travels.

18. Wheel and Axle
Is a simple machine comprised of a wheel attached concentrically to a drum so that a rope will wind and unwind alternately from the wheel to the drum creating mechanical advantage

19. Work
Is an effort that causes motion or makes up a product.