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40 Cards in this Set
- Front
- Back
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What is a physical system |
physical systems rely on a group of physical parts to perform a function |
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What is a social system |
A Group of organisms working together to perform a task |
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What are the similarities between the physical system and social system |
Similarities-both do a specific task or function Differences-social systems are made up of people or organisms physical systems are made up of a group of parts |
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A |
A |
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A |
A |
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3 |
3 |
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4 |
4 |
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How are subsystems further broken down |
5 |
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How are subsystems further broken down? What are mechanisms that are used in mechanical and in natural physical systems? |
A mechanism is part of the subsystem the changes one type of force into another one type of energy into another |
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2 |
2 |
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3 |
3 |
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How are systems and industries related |
Industries are combinations of physical and social systems that work together to produce a particular class of goods and services |
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Give examples of different industries and related physical or social systems that make up the industries |
1. Industry communication – physical system computer scanners TV Social system advertising and animators Industry construction – physical systems power saw ,backhoe, crane-social system architectural design and Land surveyor Industry service – physical systems hairstylist ,chair-social system hearth spa, walk-in clinic |
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Identify the inputs of various systems |
Inputs – the force energy or raw material that you put into a system |
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Identify the outputs of various systems |
Outputs-The task or service that a system performs |
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The side effects of various systems |
The unintended or undesired outputs of a system |
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Describe the relationship between side effects and systems thinking |
Systems thinking taking into consideration the inputs, outputs, and side effects of a systems system this can help eliminate side effects |
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Describe the six simple machines |
1. Inclined 2. Wedge 3. Screw 4. Lever 5. Wheel and axel 6. Pulley |
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What two groups in the six simple machines be categorized into |
1. The inclined plane (wedge and the screw)
2. The lever (The wheel, axle and the pulley) |
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How are levers classified |
Levers are divided into three classes Class1 Class2 Class3 |
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Given example of each lever |
Class1-The fulcrum is between the load force and the input force-ex-
Class2-The load force is between the fulcrum and the input force example of a wheel barrel
Class3-The input force is between the fulcrum in the load force-example is a fishing rod |
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Identify input force Output force And Load force of levers |
Input force – is the effort force applied to the lever
Output force – is the force the lever applies to the load
Load force – the force that the input force has to overcome in order to cause movement |
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Explain how wheel and axles works |
It consists of a large diameter disc (wheel) attached to a smaller diameter shaft(axle). Using the wheel to turn the axle change as the small input force into a large output force |
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Explain how gears work |
Gears are two wheels made up of metal or plastic. Used to speed up or slow down motion or change directions of motion. Gears either reduce the input force required to push or pull objects |
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Explain the pulley |
Pulleys use wheels and axles to make pulling objects easier, used to lift heavy loads or change direction of the force |
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Provide examples of different types of forces in every day life |
Gravity-polls on earth
Magnetic-magnet pulls or pushes
Friction – rubbing, roughness, force of resistance |
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What two components make up forces |
1. Magnitude 2.Direction |
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How is the two components of forces magnitude and direction represented and what are the units of measurement |
Magnitude – how strong the force is
Direction – which way force is pulling or pushing
Force is a measure in Newton's |
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Differentiate between mass and weight |
Mass – amount of material in an object
Weight – how strong is the force of gravity pulling on the object |
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Explain friction |
Friction is the force that resists motion between two objects in contact with each other |
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Ck all formulas and reed pg 52 |
1 |
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Explain the two types of friction that exist |
1.Static friction-The force that prevents service is at rest from sliding against one another
2. Sliding friction – the force that acts against the movement and causes the book to slow and stop example acts like a brake |
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When might we want to increase friction decrease friction how could this be done |
Increasing friction would use like a break to slow things down
Decrease friction we want to move things faster so maybe use oil slippery fluid
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Calculate MA different machines using all formulas |
Back (Definition) |
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Calculate MA different machines using all formulas |
Back (Definition) |
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What is the benefits of using a class three lever which has an MA of less than 1 |
1 |
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What is the difference between ideal an actual mechanical advantage |
Ideal mechanical advantage – the mechanical advantage of a machine if all of the input force is converted into output force never possible in real world applications
Actual mechanical advantage – mechanical advantage of the machine in real-world applications equal to ideal mechanical advantage of minus force lost two friction slippage and distortion |
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What is the formula used to figure out work |
W=FxD |
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How does energy relate to work |
Energy – the ability to work the ability to apply force to moving object a distance |
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What are the benefits of using machines |
The benefit allow us to convert a smaller input force into larger output force
A change from a small input force into a large output force is called MA. Or mechanical advantage |
