Term
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Definition
| The force exerted on an object that causes it to move. |
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Term
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Definition
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Term
| What is the metric unit for work? |
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Definition
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Term
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Definition
| Work occurs on an object when the object moves in the same direction in what the force is exerted. |
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Term
| What are the 6 types of simple machines? |
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Definition
1. inclined plane
2. wedge
3. screw
4.lever
5.wheel and axle
6.pulley |
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Term
| What is an example of each of the six simple machines? |
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Definition
inclined plane:stairs
wedge:zipper
screw:jar lid
lever:baseball bat
wheel and axle:car
pulley:crane |
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Term
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Definition
| The rate at which work is completed |
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Term
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Definition
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Term
| What is the metric unit for power? |
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Definition
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Term
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Definition
| an instrument that allows work to be done in an easier way |
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Term
| Explain first, second, and third class levers. |
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Definition
1st: fulcrum in middle
2nd: resistance in middle
3rd: effort in middle |
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Term
| Give an example of first, second, and third class levers. |
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Definition
1st: see saw
2nd: wheel barrow
3rd:baseball bat |
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Term
| What is a compound machine? |
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Definition
| a machine made of two or more simple machines |
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Term
| What are three effects that machines can have on work? |
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Definition
1. change the force
2. change the distance
3. change the direction |
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Term
| What is mechanical advantage? |
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Definition
| The number of times a machine increases a force exerted on it |
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Term
| Can mechanical advantage ever be 100%? |
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Definition
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Term
| How do you calculate efficiency? |
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Definition
| efficiency= output work / input work x 100 |
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Term
| What is ideal mechanical advantage? |
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Definition
| a machine with an efficiency of 100% |
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Term
| What is actual mechanical advantage? |
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Definition
| a machine with an efficiency that is less than 100% |
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Term
| What does it mean if mechanical advantage is equal to 1? |
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Definition
| the output force is equal to the input force |
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Term
| What does it mean if mechanical advantage is less than 1? |
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Definition
| the output force is less than the input force |
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Term
| What does it mean if mechanical advantage is greater than 1? |
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Definition
| The output force is greater than the input force |
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Term
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Definition
| the fixed point around which a lever pivots |
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Term
| How is a screw like an inclined plane? |
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Definition
| a screw is an inclined plane wrapped around a post |
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Term
| How is a wedge like an inclined plane? |
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Definition
| a wedge is an inclined plane that moves |
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Term
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Definition
| the force you exert on a machine |
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Term
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Definition
| the force the machine exerts on an object |
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Definition
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