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26 Cards in this Set
- Front
- Back
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equation for work
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w=fd
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work is measured in..
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joules
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What is work??
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an object moved in a certain distance in the direction of the applied force
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the amount of work done in a certqin amount of time
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power
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formula for power
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p=wt
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what is power measured in
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watts
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what is a machine
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a device to help you do work by spreading it out through a distance
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2 ways machines make work eaiser
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multiply force or distance
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what is a simple machine
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a machine that has only one or two parts
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list the 4 main types of simple machines
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inclined plane, whell and axle, pulley, and lever
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a bar that pivots or turns is the..
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fulcrum
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list the 3 main parts of a lever
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fulcrum, resistance, effort
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2 examples of a first class lever
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balance scale, seesaw, scissors
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list 2 examples of a second class lever
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bottle opener, whellbarrow
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list 2 examples of a third class lever
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forearm swinging a baseball bat, tennis racket, throwing a ball
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lever with a shaft
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wheel and axle
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2 examples of a whell and axle
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doorknob, steering wheel
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whell that is free to spin on its axle
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pulley
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give an example of a pulley
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water well, pulley on top of a flagpole
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flat slanted slope
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inclined plane
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2 examples of an inclined plane
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stairs, ramp
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use for a wedge
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to push things apart
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2 examples of a wedge
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nail to boards, chisel, knifeblade
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a skrew is a what
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an inclined plane wrapped around a cylinder
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what do you get when you cambine 2 or more simple machines?
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a compound machine
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give 2 examples of a compound machine
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bicycle, hammer, can opener
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