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# GS Mod 4

### Apologia Exploring Creation with General Science Module 4

Applied science The motivation behind it is aimed at trying to find something useful
Technology Is a new process or machine that makes life better or makes a job easier
Simple Machine A device that either multiplies or redirects a force
Force A push or pull exerted on an object to change that object's velocity
Fulcrum A fixed point
Lever Simple machine that magnifies either force or motion
Effort The force being applied to the lever
Resistance The weight the machine is manipulating
Mechanical Advantage The amount by which force or motion is magnified in a simple machine
Mechanical advantage for the lever Distance from the fulcrum to effort divided by the distance from fulcrum to resistance
First class lever The fulcrum is positioned between the effort and resistance
Second class lever The fulcrum is positioned at one end of the bar and the resistance is between the fulcrum and the effort
Third class lever The fulcrum is at one end of the bar and the effort is between the fulcrum and the resistance
Diameter The length of a straight line that travels from one side of a circle to another and passes through the center of a circle
Mechanical advantage for the wheel and axle Diameter of the wheel divided by the diameter of the axle
Pulley A grooved wheel that rotates freely on a frame
Block and tackle Multiple pulley system. Mechanical advantage for pulleys in a block and tackle = numbers of pulleys used
Inclined Plane Allows you to slide the load up rather than lifting it straight.
Mechanical advantage of the inclined plane Length of the slope divided by height
Wedge Generally used to separate things
Mechanical advantage for the wedge Length of the slope divided by height
Pitch The vertical distance between the threads of the screw
Mechanical advantage of the screw circumfrence divided by pitch
Circumference The distance around a circle, equal to 3.1416 times the circle's diameter
Created by: barbara.macri

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