Vocabulary #3 (Simple machines)

1. Simple machine: a device with few parts that makes it easier to do work.

2. Effort force: the force applied to a machine.

3. Resistance force: the force that a machine acts against.

4. Lever: a simple machine made of a rigid bar ona pivot point.

5. Fulcrum: the pivot point of a lever.

6. Mechanical advantage: the number of times a machine multiplies the force applied.

7. Pulley: a grooved wheel that turns by the action of a rope in the groove.

8. Wheel and axle: a simple machine made of a handle or axis attached to the center of a wheel.