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PS Chp 13:Machines

PS Chapter 13: Simple Machines Coach Leach

TermDefinition
Work The energy transferred to a system by an external force when it acts on the system to move it.
Power The rater of doing work.
Simple Machine A basic mechanical device that changes the magnitude, direction, or distance traveled of the force used when doing work.
Mechanical Advantage The amount by which a simple machine multiplies an input force to produce an output force.
Lever A simple machine that consists of a rigid bar that turns about a pivot point.
Fulcrum The point about which a lever pivots or rotates.
Torque A force that tends to cause a rotation about a pivot point.
Wheel and Axle A simple machine consisting of a wheel with a rod running through its axis that acts as the pivot point.
Gear A simple machine that consists of a wheel with teeth on its perimeter that mesh with similar teeth of other gears to do work.
Pully A simple machine that consists of a wheel and axle system with a groove around the perimeter of the wheel in which a rope, cable, or belt moves with the wheel as it rotates.
Inclined Plane A simple machine that consists of a plane whose opposite ends are at different heights.
Ideal Mechanical Advantage The mechanical advantage for an ideal machine with no friction.
Actual Mechanical Advantage The mechanical advantage that accounts for all mechanical losses sustained through using a machine.
Efficiency A comparison of the amount of usable energy remaining after a process with the original amount of energy that went into the process.
Wedge A simple machine consisting of two inclined planes attached at an acute angle and used to spread a material appart as it is forced into the material.
Screw A simple machine that consists of an inclined plane wrapped around a cone or cylinder in a spiral pattern.
Compound Machine A machine that combines two or more simple machines.
Created by: CoachLeach
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