| A | B |
|---|
| subsystem | one of the working parts that makes up a complex machine |
| pulley | a rotating wheel with a grooved rim |
| effort force | the force you exert |
| system | a complex machine mad eup f simpler working parts |
| inclined plane | a ramp |
| energy | the ability to do work |
| work | is done when force is exerted on an object and it moves in the general distance of the direction of force. |
| machine | any device that uses energy to perform a function |
| class 1 lever | a lever in which the fulcrum is betwen the effort and the load |
| lever | a straight rigid bar that pivots on a fulcrum |
| class 2 lever | the load is between the fulcrum and the effort |
| class 3 lever | the effort is in between the fulcrum adn the load |
| fulcrum | the point on which the lever is supported and it turns or pivots |
| wheel and axel | a large wheel and a smaller wheelmounted ona common axis so that the wheels rotate together |
| force advantage | the advantage that is provided by a machine when the effort forceis smaller than the force of gravity on the load being moved |
| speed advantage | a speed increase provided by a machine when a load moves agreater distance than the distance of the effort force exerted on it . |
| screw | an inclined plane wrapped around a cylinder |
| wedge | like an inclined plane but moves into an object |
| multiplying gears | a gear train tat increases the rotational speed of a device |
| reducing gears | a gear train that decreases the rotational speed of a device |
| parallel gears | two identical gears meshing togther |
| gear train | 2 or more gears meshing together |
| gear wheel | wheel that are precisdely made with identical teeth a round its edge |
| mesh | interlock neatly |
| wheel | the larger wheel in a gear train |
| pinion | the smaller wheel in a gear train |
| driven gear | the gear that the force is applied to in a gear train |
| driving gear | the gear that suppplies the force in a gear train |
| sprockets | a gear wheel turned by a looped chain |
| potential energy | stored energy |
| kinetic energy | energy of motion |
| mechanical energy | the type of energy associated with mechanical devices |
| elastic potetial energy | energy stored in an elastic band or spring |
| thermal energy | the total energy of all the particles in a materal or object |
| efficiency | a measure (percent) of amount of input energy compared to output |
| incadescent | gives off light due to heat |
| energuide # | a guide that measures how much energy an appliance uses a month |
| efficiency = | output/input x 100% |
