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26 Cards in this Set
- Front
- Back
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System |
A structure that has parts that are connected and influence each other in some way |
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Purpose |
What the system is to accomplish |
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Input |
The things that are put into the system. Can be physical or other (energy, movement etc.) |
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Output |
What is obtained from the system. Can be physical or other (energy, movement, etc.) |
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Components |
The parts of a system |
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Processes |
The actions, taken by the system, that allow it to convert the input to the output |
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Movement |
A change in location of all or part of the system |
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Force |
A push or pull that can cause movement |
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Work |
The transfer of energy through motion |
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Energy |
The ability to do work |
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Efficiency |
A ratio of the work obtained from a system to the work put into the system OR A ratio of the actual mechanical advantage of a system to the ideal mechanical advantage of the system |
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Lever |
A bar that is free to rotate about a fixed point |
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Load |
The output force exerted by the lever |
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Effort |
The input force exerted on the lever |
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Fulcrum |
The lever’s point of rotation |
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Load arm |
The distance between the load and the fulcrum |
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Effort arm |
The distance between the effort and the fulcrum |
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Class 1 Lever |
A lever in which the fulcrum is between the load and the effort |
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Class 2 Lever |
A lever in which the load is between the effort and the fulcrum |
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Class 3 Lever |
A lever in which the effort is exerted between the fulcrum and the load |
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Mechanical Advantage |
A ratio of what is produced by a machine (output) to what is put into the machine (input) How many times “stronger” the system is |
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Ideal Mechanical Advantage |
The mechanical advantage calculated based on measurements of dimensions of the machine |
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Actual Mechanical Advantage |
The mechanical advantage calculated based on measurements of the actual input and output of the machine |
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Wheel and Axle |
A simple machine that uses rotating parts fixed about a single axis |
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Wheel ( of a wheel and axle ) |
The part of the wheel and the axle that you turn |
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Axle ( of a wheel and axle ) |
The part of the wheel and axle that turns as a result of the wheel being turned |
