Poe Unit 1 Review

Front 1

Simple Machines

Back 1

Redirect force by multiplying force, distance, and/or speed.

Front 2

Mechanical Advantage

Back 2

MA = R / E
R = Resistance force
E / Magnitude of effort force

Front 3

Lever MA

Back 3

MA = LE / LR
LE = Length to effort
LR = Length to resistance

Front 4

Moment Formula

Back 4

Moment = Force X Distance

Front 5

IMA & AMA

Back 5

IMA = Ideal Mechanical Advantage
AMA = Actual mechanical Advantage

Front 6

Wheel And Axle IMA

Back 6

IMA = De / Dr
MA = R / E

Front 7

Pulley AMA

Back 7

AMA = Fr / Fe

MA = Number of strands

Front 8

Gear Ratio

Back 8

GR / 1 = N out / N in = D out / D in = w out / w in = Tout / T in

Front 9

Gear Ratio

Back 9

MA = GR = No/Ni X No/Ni

Front 10

Inclined Plane IMA

Back 10

IMA = De / Dr
De = Length
Dr = Height

Front 11

Wedge IMA

Back 11

IMA = De / Dr
De = effort distance
Dr = resistance distance

Front 12

Screw IMA

Back 12

IMA = De / Dr
De = Circumfrence
Dr = Pitch

Front 13

Energy Sources

Back 13

–Nonrenewable= Fossil fuels, Uranium
–Renewable = Animal, Food, biomass
–Inexhaustible = Hydroelectric/tidal, Geothermal , Wind, Solar

Front 14

Work

Back 14

Work = F X d
Work = Force X Distance

Front 15

Joule

Back 15

1 joule = 1 newton X 1 meter

Front 16

Power

Back 16

P = W / T
Power = Work / Time

Front 17

Watt

Back 17

One watt is equal to 1 joule of work per
second

Front 18

Mechanical Winch

Back 18

Power output: Work / time
Power input: Voltage * current
Efficiency = P out * 100
P in

Front 19

Conservation of Energy

Back 19

Energy cannot be created or destroyed, but it can
change from one form to another.

Front 20

Energy Conversion

Back 20

Changing one form of energy to another

Front 21

Efficency

Back 21

Efficiency% =output / input x100

 
 
 

Front 22

Electrical Circuit

Back 22

A system of conductors and components forming a complete path for current to travel

Front 23

Voltage, Current, Resistance

Back 23

Voltage = measured in Volts; symbol is V
Current = measured in Amps; symbol is A
Resistance = measured in Ohms; symbol is Ω

Front 24

Series Circuits

Back 24

• Components are connected end-to-end.
• There is only a single path for current to flow.

Front 25

Parallel Circuits

Back 25

•Both ends of the components are connected together.
•There are multiple paths for current to flow.

Front 26

Hydrogen Fuel Cell:

Back 26

Creates electricity and heat through electrochemical process that converts hydrogen and oxygen to water

Front 27

Thermodynamics

Back 27

The study of the effects of work, heat flow, and energy on a system

Front 28

Thermal Energy (heat) Transfer

Back 28

The transfer or movement of thermal energy

Front 29

Convection

Back 29

movement of air

Front 30

Conduction

Back 30

movement thru an object through touching

Front 31

Radiation

Back 31

electromagnetic waves

Front 32

Calculating Energy Transfer

Back 32

Q = Energy transfer
U = U value
Temp = temperature
Q = U * A * change in TempRemember

Front 33

Design Process

Back 33

A design processis a systematic problem-solving strategy, with criteria and constraints, used to develop many possible solutions to solve or satisfy human needs or wants and to narrow down the possible solutions to one final choice

Front 34

Design Brief

Back 34

-defines the problem
-identifies the client
-clearly states client’s problem
-Lists specifications
-Lists constraints

Front 35

Design Team

Back 35

A team is a collection of individuals, each with his or her own expertise, brought together to benefit a common goal.

Front 36

1. Define a Problem

Back 36

Receive a problem to solve from the client.
•Gather information.
•Be inspired through media exposure of a current problem and take action.

Front 37

2. Brainstorm

Back 37

• Generate and record ideas.
• Keep the mind alert through rapidly paced sessions.
• Develop preliminary ideas based on constraints

Front 38

3. Generate and Research Ideas

Back 38

•Conduct interviews with those affected by the problem.
•Research solutions that may already exist; identify shortcomings and reasons why they aren't appropriate to a given situation.
•Compile ideas and report findings to the team.

Front 39

4. Identify Criteria and Specific
Constraints

Back 39

•Identify what the solution should do and the
degree to which the solution will be pursued.
•Identify constraints (i.e., budget, time, etc.).
•Draft the Design Brief.

Front 40

5. Explore Possibilities

Back 40

•Consider further development of brainstorming ideas with constraints and tradeoffs.
•Explore alternative ideas based on further knowledge and technologies.

Front 41

6. Select an Approach

Back 41

•Review brainstormed information and answer any lingering questions.
•Narrow ideas down through a voting process, or by use of a decision matrix.
•Decide on final idea, usually through group consensus.

Front 42

7. Develop a Design Proposal

Back 42

•Explore the idea in greater detail with annotated sketches.
•Make critical decisions such as material types and manufacturing methods.
•Generate through computer models detailed sketches to further refine the idea.
•Produce working drawings so the idea can be built.

Front 43

8. Make a Model or Prototype

Back 43

•Make models to help communicate the idea and to study aspects such as shape, form, fit, or texture.
•Construct a prototype from the working drawings so that the solution can be tested.

Front 44

9. Test and Evaluate the Design Using Specifications

Back 44

•Design experiments and test the prototype in controlled and working environments.
•Gather performance data; analyze and check results against established criteria.
•Conduct a formal critique to flesh out areas of concerns, identify shortcomings, and establish any need for redesign work.

Front 45

10. Refine the Design

Back 45

•Make design changes; modify or rebuild the prototype.
•Make refinements until accuracy and repeatability of the prototype’s performance results are consistent.
•Update documentation to reflect changes.
•Receive user’s critique to provide outside perspective in order to determine whether established criteria have been met.

Front 46

11. Create Solution

Back 46

Build

Front 47

12. Communicate Processes and
Results

Back 47

•Communicate the designer’s final solution
through media such as PowerPoint, poster
session, technical report.
•Market the Product.
•Distribute.