Simple Machines

4. a unit of power equal to 550 foot-pounds per second (745.7 watts).
7. the point on which a lever rests or is supported and on which it pivots
8. energy that is produced by mechanical, chemical, nuclear, kinetic, gravitational, potential, nuclear, etc.
9. and Axle, one of mankind's greatest inventions
11. a piece of wood, metal, or some other material having one thick end and tapering to a thin edge, that is driven between two objects or parts of an object to secure or separate them.
13. requires the object to move
16. distance, the length of the sloped surface of the ramp
17. an apparatus using or applying mechanical power and having several parts, each with a definite function and together performing a particular task.
18. advantage, the ratio of the force produced by a machine to the force applied to it, used in assessing the performance of a machine

1. force, the amount of effort used to push down on a rod, or pull on a rope in order to move the weight
2. output, the work done by a simple machine, compound machine, or any type of engine model
3. machine, a machine made of two or more simple machines
5. a way to measure energy
6. plane, a plane inclined at an angle to the horizontal.
8. a wheel with a grooved rim around which a cord passes. It acts to change the direction of a force applied to the cord and is chiefly used (typically in combination) to raise heavy weights.
10. a rigid bar resting on a pivot, used to help move a heavy or firmly fixed load with one end when pressure is applied to the other
12. getting stuff done in a practical way
14. force, the force exerted on an object by a simple machine
15. a unit for measuring work