2. * The distance over which the effort force acts in a simple machine. * The force exerted by a person or motor when using a machine to lift a load.

3. * Unit of work and energy in the metric system. (Nm) * A ramp or board positioned with one end higher than the other end.

4. * A rod or similar object that rotates around a pivot point. * The distance a load moves when acted on by a load force.

5. * The force a machine exerts to lift a load. (equal to weight when pulled straight up) * The rate of doing work. * P=W/t

6. * A wheel or cylinder with a rope around its outer rim. * A device that can do work and reduce the amount of effort force needed to do the work.

7. * Unit of power in the metric system. * 1 Joule per second * The product of force and the distance through which it acts. * W=Fd

8. * The ratio of the output work to input work for a machine that tells how well it works.

9. * The ratio of effort distance to load distance.

10. * The work done by the effort force in a simple machine or motor. (F E x d E )

11. * The work done on a load by a machine or motor. (F L x d L )