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Ch5 Vocabulary

TermDefinition
Work When a force is applied to the object and the object moves in the same direction as the applied force.
Power The rate at which work is done.
Machine Device that makes doing work easier.
Effort force The force that is applied to the machine.
Output force The force applied by the machine.
Mechanical advantage The amount by which a machine multiplies the effort force.
Efficiency A measure of how much of the work put into a machine is changed into useful output work by the machine.
Joules Unit of work
Newtons Unit of force
Watts Unit of time
Simple machine A machine that does work with only one movement of the machine
lever, pulley, wheel and axles, inclined plane, screw, and wedge The 6 types of simple machines.
lever A bar that is free to pivot or turn around a fixed point.
pulley A grooved wheel with a rope, chain, or cable running along the groove.
IMA Mechanical advantage that does not include friction.
Wheel and axle A simple machine consisting of a shaft or axle attached to the center of a larger wheel, so that the wheel and axle rotate together.
Gear A wheel and axle with the wheel having teeth around its rim.
Inclined plane A sloping surface that reduces the amount of force required to do work.
Screw An inclined plane wrapped in a spiral around a cylindrical post.
Wedge An inclined plane with one or two sloping sides, that changes the direction of the input force.
Compound machine Two or more simple machines that operate together
Created by: Ms. Lincoln