Vocabulary N°3

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

• The hammer is an example of a simple machine.

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

• The one who goes down in the seesaw do the effort force.

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

• The one who goes up in the seesaw do the resistance force.

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

• An example of a lever is the seesaw.

5. Fulcrum: The pivot  point of a lever.

• Do you know that the fulcrum is the pivot point of the lever?

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

• A machine´s mechanical advantage is found by dividing the effort arm by the resistance arm.

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

• The example of a pulley is a piñata.

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

• This crank is a type of wheel and axle.