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Definition
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mech. adv. of a wheel and axle |
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Definition
radius of wheel --------------- radius of axle |
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Term
mech. adv. of an inclined plane |
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Definition
length of incline ----------------- height of incline |
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Mech. Adv. (general equation) |
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Definition
Output force ------------ Input force |
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Definition
output work ----------- input work
x 100% |
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Term
In order to do work on an object... |
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Definition
the force you exert must be in the same direction as the object's motion |
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Definition
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Definition
device that makes work easier, faster, or changes the direction of work |
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Definition
device that makes work easier, faster, or changes the direction of work |
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Definition
the force you exert on a machine |
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Definition
force exerted by the machine |
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Term
the output force is always ______ than the input force |
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Definition
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Term
mechanical advantage of multiplying force |
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Definition
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mechanical advantage of multiplying distance |
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Definition
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mechanical advantage of changing direction |
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Definition
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Term
define actual mechanical advantage |
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Definition
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Term
define ideal mechanical advantage |
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Definition
MA of a machine without friction |
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Term
the more efficient a machine is, the ________ it is to its ideal mechanical advantage |
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Definition
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Term
name the six basic kinds of simple machines |
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Definition
-inclined plane -wedge -screw -lever -wheel and axle -pulley |
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Definition
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advantage of incline plane |
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Definition
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Term
the longer the incline, the _____ input force you need to push or pull an object |
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Definition
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Term
no machine is 100% _______ because of ________ |
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Definition
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Term
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Definition
device that is thick at one end and tapers to a thin edge at the other end |
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Definition
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Definition
an inclined plane wrapped around a cylinder |
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Definition
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Definition
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Term
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Definition
rigid bar that is free to pivot about a fulcrum |
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Definition
the fixed point that a lever pivots around |
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Definition
folcrum is between output & input |
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Definition
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give an example of a first class lever |
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Definition
scissers, pliers, seesaws |
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Definition
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Term
give examples of second class levers |
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Definition
doors, nutcrackers, bottle openers |
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