Simple Machines

3. strength or energy as an attribute of physical action or movement.
5. an effort must overcome order to do work frictional forces of air against moving objects
7. the point on which a lever rests or is supported and on which it pivots.
8. a supposition or a system of ideas intended to explain something, especially one based on general principles independent of the thing to be explained.
11. the ratio of the force produced by a machine to the force applied to it, used in assessing the performance of a machine.
12. force applied with distance
14. any of the basic mechanical devices for applying a force, such as an inclined plane, wedge, or lever.

1. applied at one point on the lever in order to move an object, known as the resistance force, located at some other point on the lever.
2. the variable that the scientist changes
4. the variable (outcome) that depends on the what the scientist does to change the experiment
6. A machine consisting of two or more simple machines operating together
9. the secondary or vertical axis of a system of coordinates, points along which have a value of zero for all other coordinates.
10. a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.
13. the principal or horizontal axis of a system of coordinates, points along which have a value of zero for all other coordinates.
15. a generalized rule to explain a body of observations in the form of a verbal or mathematical statement