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Work
the energy transferred to or from an object via the application of force along a displacement
Machine
A devices by means of which a primary force (called the effort ) exerted over some displacement at one location gives rise to a secondary force
Work Input and Output
Work Input is the amount of energy supplied to the machine
Work output is the amount of desired work that is done by a machine
Level
Acceleration of an object
Inclined planes
slanted surface along which a force moves and object to a different elevation: steeper slope: more input force needed cuz input distance(trail) is greater than output distance(height)
Joule
unit of work or energy in the International System of Units (SI); it is equal to the work done by a force of one newton acting through one metre
Input Force
The force applied to a machine
Mechanical Advantage
a measure of the ratio of output force to input force in a system
Fulcrum
the point on which the beam pivots
Wedge
V-shaped object whose sides are two inclined planes sloped toward each other
Power
is the amount of energy transferred or converted per unit time
Output Force
the force the machine applies to the object you are trying to move
Actual Mechanical Advantage
the mechanical advantage determined by physical measurement of the input and output forces
Input Arm
distance between fulcrum and input force
Screw
Inclined plane wrapped around a cylinder
Watt
the International System of Units' (SI) standard unit of power (energy per unit time), the equivalent of one jouleper second
Input Distance
the length of the sloped surface of the ramp
Ideal Mechanical Advantage
the mechanical advantage of a perfect machine with no loss of useful work caused by friction between moving parts.
Output Arm
distance between output force and fulcrum
Pulley
simple machine that consists of a rope that fits into a groove in a wheel, produce an output force different in size/direction/both from that of input force
Horsepower
My dodge Hellcat has about 800 horesepower
Output Distance
the height of the ramp, or the vertical distance the object is raised
Efficiency
heat engine is the ratio of the useful work done by the system
Wheel and axle
two disks or cylinder, each with a different radius
Screwdriver: handle: input force and shaft: output
Compound Machine
consists of two or more simple machines to make work easier