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# Science

Work equation: Definition: Unit: Force applied over distance W=FxD JOULES
Power equation: Definition: Unit; Rate of work P=w over time Watts
Efficiency equation: Definition: Output over input times 100 How well the machine works
Mechanical advantage equation: Definition: MA=OUTPUT OVER INPUT How well the machine works.
Types of machines Inclined plane- sloping surface used to raise objects Examples: ramp, hill, stairs
Types of machines Ledge- two sloping slides Examples: scissor, ax, zipper
Types of machines Lever- a bar that is free to pivot about a fixed point Examples: see-saw, bat, nut cracker
Types of machines Pulley- grooved wheel with a rope Examples: flag pole, blinds
types of machines wheel and axle- two wheels of different sizes that rotate together examples: wheel, doorknob
work input the work you put into the machine
work output the work the machine does for you
lose energy as heat
machine makes work easier for you by multiplying the force
what is the unit of distance meters
what is the unit of force newtons
what is the unit of work joules
what is the unit of weight newtons
what is the unit of power watts
Created by: samtheman259

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