Design Thinking/ Engineering Process
The scientific word that mean model that you can test
Prototype
Which factor didn't drive change until the 2000s
why?
environmental
because we had yet to see the effects of the industrial revolution
Draw a first class lever
Label the Fulcrum, Effort and Load
What type of advantage does it have and why?
How can you change the type of advantage while still having a first class lever
All answers will very. Make sure the whole group agrees.
Use notes if you have to
Draw a fixed pulley
What type of advantage does it have
What happens to the direction
No advantage
Changes direction
What is the difference between a driver and a driven gear?
Driver gear has the force put into it
Driven gear is what is being moved
The very first step to make sure you fully understand the needs of the customer
Empathize
Name one technology put into a car to drive environmental change
will vary
Draw a second class lever
Label the Load Effort and Fulcrum
What does this do to the speed and the force?
What type of advantage do you have?
Load in the middle
speed decreases and force needed decreases
mechanical advantage
Draw a movable pulley
What type of advantage does it have
What happens to the direction
force advantage
same direction
Why would I use an idle gear or a chain
Is there a mechanical change?
Why?
To keep the direction the same
No
because any change going into the idle gear will lost when going into the driven gear
The step that will ensure learning and improvement never stops
Reflect and Redesign
safety glass was invented in a lab and then used for a car. What factor drove this change
Scientific advancement
Draw a third class lever
Label the Fulcrum, Load, Effort
What happens to the speed and force
What type of advantage does it have
Effort in the middle
Speed increase, force decreases
speed advantage
Draw a block and tackle pulley
What type of advantage does it have
What happens to the direction
mechanical
changes direction
If I have a driver gear of 30 and a driven gear of 60
What type of advantage do I have?
What is the gear ration
force advantage
0.5
What does it mean to ideate
Come up with as many solutions as you can so if one of them doesn't work you have more ideas to try
What factor is at play with people are angry about something so they demand change
societal
mechanical advantage decreases
Can I ever get a speed advantage with a pulley?
No
If I have 4 gears. The first one is 50 teeth and the last has 25 teeth what type of directional change would I have? what type of advantage do I have? what is the gear ratio
opposite directions
speed advantage
2
The process that ensure your solution works and does not create more problems
test
What factor drives change when we can test a porotype a million times before releasing it to the public
Trial and error
How do I increase the mechanical advantage of a first class lever without changing the class of the lever?
move the fulcrum closer to the load while keeping it in the middle
what is a limitation when adding more pulleys to compound or block and tackle pulley?
The more force advantage the more space you need to pull. Add too much force advantage and you will need lots of room to pull the other end
In hydraulics if my input piston is is larger than my output piston what type of advantage do I have?
Speed