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Wedges
a pair of inclined planes wrapped around a cylinder.
Screws
an inclined plane wrapped around a cylinder.
Mechanical Advantage
the number of times the machine multiplies force.
Mechanical Efficiency
work output /work input +100 (measured as percentage %)
Mechanical Advantage
output force (N)/input force (N)
Work
Is done when a force causes an object to move in the direction of the force
Simple Machine Does What
make work easier; NOT LESS WORK
Machine
a device that makes work easier by changing the size or direction of the force
Work Input
the amount of work you put into the machine
Work Output
the amount of work done by the machine
Mechanical Advantage
the number of times the machine multiplies force
Mechanical Efficiency
work output/work input +100 (measured as percentage %)
1st Class Lever
the fulcrum is between the input force and output force
2nd Class Lever
fulcrum at one end with input force at the other end and output force in between
3rd Class Lever
the input force is between the fulcrum and the output force
Pulleys
a simple machine that has a grooved wheel and a rope or cable
Wheel and Axle
simple machine consisting of two circular objects of two different sizes.
Incline Plane
a simple machine that is a straight slanted surface (ramp)
Screws
an inclined plane wrapped around a cylinder
Lever Equation
Distance from Input Force to Fulcrum/Distance from Output Force to Fulcrum
Incline Plane Equation
Length of ramp/ Height of ramp
Wheel and Axle Equation
Radius of the wheel / Radius of the axle
Pulley Equation
If going down, Count # of pulleys ; If going up count the number of ropes
Wedge Equation
Length of the wedge / the thickest part of the wedge
Compound Machine
two or more machines combined into one
Note 
Flashcard (90)