| A | B |
|---|
| lever | simple machine that consists of a bar, a rod, or a handle and a fulcrum |
| fulcrum | the "hinge" or swivel point of a lever |
| effort arm | the part of the lever between the fulcrum and the point where force is applied |
| resistance arm | the part of a lever between the fulcrum and the load to be moved |
| pulley | a grooved wheel with a string, rope or belt tracking through the grove |
| incline plane | a sloped ramp that spreads a lift over a greater distance |
| wheel and axle | circular object with a rotating shaft fixed to or extending through the center of the object |
| wedge | an angular object that comes to a point or a sharp edge |
| screw | cylindrical shaft that comes to a point and has a inclined plane spiraled over the surface of the shaft |
| work | occurs when a force moves something a measurable distance |
| foot pounds | an english unit used to specify an amount of work accomplished |
| newton meter | a metric unit used to specify an amount of work accomplished (also known as a joule) |
| power | an amount of work accomplished during a specified unit of time |
| horse power | 550 foot pounds per second |
| M.A. | Mechanical Advantage - in an incline plane, the length divided by the height of the ramp |
| torque | a rotational force that causes an axle to turn - meauured in foot pounds |
| simple machine | device that makes work easier, faster, or changes direction of motion |
| compound machine | type of machine that integrates two or more simple machines |
| energy | the capacity (ability) to do work |
| kinetic energy | the type of energy in an object that is in motion |
| potential energy | the type of energy in a object that is at rest (boulder on a cliff) |
| Conservation of Energy | a law of physics that states that while energy may change form the amount remains the same |
| nuclear energy | a type of energy that comes from the nucleus of an atom |
| electrical energy | the type of energy that comes from the flow of electrons |
| solar energy | a from of radiant energy that comes from the sun |
| chemical energy | energy that comes from a chemical reaction (a battery is an example) |
| radiant energy | energy that exists as waves |
| horsepower | 550 foot pounds per second |
| joule | a metric unit for measuring work - also knows as a Newton-meter |
| friction | force that resists relative motion between two objects in contact |
