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45 Cards in this Set
- Front
- Back
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Mechanical Advantage Formula Measurement |
Output Force divided by Input Has No Measurement |
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Speed Ratio |
Input Distance divided by output distance |
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Efficiency |
MA divided by SR or Work output divided by input |
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Work |
Force x Distance Measured in Joules |
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Pressure |
Force divided by area : 1N x 1m = 1 Pa |
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Pressure In a hydraulics system is |
Always Equal- force only changes if the area of the piston does |
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If the driving gear is larger than the driven gear... |
the speed is increased but there is less force |
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If the driving gear is smaller than the driven gear... |
the speed is reduced but there is more force |
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Vocab Machine |
A device that help us do work and meet our needs |
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Vocab Archemedes Screw |
Large screw inside a tube to help move water |
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Vocab Simple Machine |
Tool or device made up of one basic device |
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Vocab Lever |
Bar or plank that can rotate around a fixed point called a fulcrum |
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Vocab Inclined Plane |
A flat surface at an angle to another flat surface |
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Vocab Wedge |
Like an inclined plan but is used to 'wedge' things apart (stop movement, cut) |
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Vocab Screw |
Cylinder with a groove cut in a spiral on the outside |
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Vocab Pulley |
Consists of wire, rope or cable moving on a ground wheel |
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More wheels on a pulley is |
Less effort |
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Vocab Wheel and Axle |
Combination of 2 wheels with different diameters |
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Longer Motion on the wheel creates... |
A shorter but more powerful motion at the axle |
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Give an example of a first class lever |
Scissors, Catapult, Teetor Totter |
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Give an example of a second class lever |
Wheel Barrel, Nut Cracker |
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Give an Example of a Third Class Lever |
Broom, Baseball Bat, Hockey stick |
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Vocab Complex Machine |
Device made up of several simple machines |
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Vocab System |
Group of parts that work together to perform a function Bike to move a Human |
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Vocab Sub-System |
Group of parts that perform together |
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Systems that transfer Force Linkege |
Belt or chain that transfers energy form a source to an object |
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What are the 2 types of Linkege and the advantage |
Belt & Chain Chains have a less chance of slipping because of the Grooves Belts are high tension so they can be used where chains cannot |
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Systems that transfer Force Transmission |
Special Type of Linkage for transferring energy from the engine/power to the wheel |
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What does a transmission contain |
Different gears that allow operator to apply a) large force- but moves objects slower b) small force- moves objects quickly |
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Vocab Low Gear |
small wheel rotates faster than the engine does. Reduces power but increases speed |
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Vocab High Gear |
Large wheel rotates slower than the engine does. less speed but more power. |
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Vocab Gears |
Pair of wheel that have teeth to interlink |
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Gears can be used to... |
increase or decrease speed, change direction of motion |
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Vocab Mechanical Advantage |
The amount a machine can multiply a force |
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Vocab Input Force |
Amount of force applied to a machine |
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Vocab Output Force |
The force the machine applies to the object |
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Vocab Speed |
The distance an object travels in a given time |
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Vocab Speed Ratio |
how the speed of an object is affected by the machine |
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Vocab Effiency |
How well a machine uses energy |
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Vocab Work |
When a force acts on an object to make the object move |
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Liquids can't be compressed.... |
as much as air |
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Vocab Pressure |
amount of force that is applied to a given area |
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Pascals Law: |
pressure applied to an enclosed fluid is transmitted equally in all directions throughout the fluid |
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Vocab Piston |
A disk that fits tightly inside a cylinder |
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Hyrdaulics have a _____ MA. Why? |
Great. The Hydraulics system multiplies the force a lot more than other machines. |
