PLTW ROBOTICS summative review

​PLTW Robotics UNIT 1

By Matthew Molloy

Any Slides that do not have a question attached are notes. WRITE THEM DOWN/DRAW THEM IN YOUR NOTEBOOK!

P.S. There will be a vocabulary test as part of the retesting after we review

• A Driving Gear may also be called an input Gear since It inputs power into the system

• A driven Gear call also be called an output gear since it takes power out of the system to do work

Labelling

Identify the driving gear, the driven gear, and the idler.

Drag labels to their correct position on the image

Idler Gear

Driven/Output Gear

Driving/input gear

Open Ended

How can you identify the input and output of a mechanical system?

Open Ended

How can you identify the input Gears and output gears of a mechanical system?

Open Ended

What is the purpose of an idler gear?

Open Ended

In the gear train image below, what direction will the driven gear turn—clockwise or counterclockwise? In the same direction as the driving gear or opposite?

Open Ended

Summarize this client summary/design brief

Open Ended

How are build guides, images, and written directions used to communicate designs? Give an example.

Open Ended

Give two examples of an input device.

Open Ended

Give two examples of an output device.

Open Ended

Write the name of this class in CamelCase

Open Ended

Why is it important to label your motors when setting up devices on VEXCode? (instead of leaving them as "motor1", "motor2", ect.)

Open Ended

What will this program do when you run it?

Open Ended

Analyze this code and explain what it will do when run.

Open Ended

Why is testing a robotic design necessary and important?

Open Ended

What is the value of incrementally building and programming solutions? Why might this approach be helpful for engineers and software developers when they design and build solutions?

Open Ended

Reflect on the videos.

What is the role of the Driver?

What is the role of the Navigator?

Name two important skills that you should practice when using pair programming.

Open Ended

How does flowcharting help you think through an algorithm?

Open Ended

How many times will this loop?

Open Ended

How many times will this loop?

Open Ended

Reflect on the loops to answer the following questions:

1. What actions will both loops do while the loop is running?

2. How many times will the robot move forward in the repeat loop?

3. For how long will the robot move forward with one execution of the loop?

Open Ended

How are loops useful in coding?

Open Ended

What is the relationship between the size of the gears and the resulting output speed of the system? For example, how do you cause the resulting output speed to be faster, slower, or the same as the input speed?

Open Ended

Which gear ratios will cause the right-hand gears to rotate faster than the left-hand gears?

Open Ended

You are a designer and have been asked to create a prototype of an electric fan that spins at least 300 rpm. Your materials for the prototype include an electric motor that spins at 150 rpm and a variety of gear sizes. Describe a gear train that you might create to meet the requirement.

Open Ended

Does the output speed increase, decrease, or stay the same?

please label as 1, 2, and 3

Multiple Choice

A 36 tooth driving gear (connected to the motor) is moving a 12 tooth driven gear. What is the gear ratio?... It has a speed advantage.

• 3:1

• 1:3

• 3:3

• 1:1

Multiple Choice

A 12 Tooth driving gear (connected to the motor) is connected to a 36 tooth driven gear. What is the gear ratio and mechanical advantage?

• 3 : 1 Torque Advantage

• 3 : 1 Speed Advantage

• no Mechanical Advantage

• 1 : 3 Torque Advantage

Multiple Choice

A 12 Tooth driving gear (connected to the motor) is connected to a 36 tooth driven gear. What is the gear ratio and mechanical advantage?

• 3 : 1 Torque Advantage

• 3 : 1 Speed Advantage

• no Mechanical Advantage

• 1 : 3 Torque Advantage

Multiple Choice

Looking at the picture, what is the gear ratio?

The arrow indicates how the motor is turning the gear.

• 6 : 10

• 5 : 3

• 10 : 6

• 3 : 5

Multiple Choice

What's the ratio?

Make sure ratio is reduced

• 1:1

• 84 : 60

• 60 : 36

• 5 : 3

Multiple Choice

What's the ratio?

Make sure ratio is reduced

• 7 : 1

• 12 : 84

• 84 : 12

• 1 : 7

Multiple Choice

When gears are equal in size, what is the gear ratio?

• There is no gear ratio when sizes are equal

• 1:3

• 2:5

• 1:1

Multiple Choice

What is the gear ratio with a driving gear with 40 teeth and a driven gear with 8 teeth?

Make sure ratio is reduced to lowest terms

• 8 : 40

• 1 : 5

• 5 : 1

• 40 : 8

Multiple Choice

What is the Gear Ratio of a driven gear with 8 teeth and a driving gear with 32 teeth?

Make sure ratio is reduced to lowest terms

• 8 : 32

• 32 : 8

• 1 : 4

• 4 : 1

Multiple Choice

The input gear has 6 teeth.

The output gear has 48 teeth. The gear ratio is...

Make sure ratio is reduced to lowest terms

• 1 : 8

• 8 : 1

• 6 : 48

• 48 : 6

Multiple Choice

# of teeth output gear = 30

# of teeth input gear = 60

What is the gear ratio (in lowest terms)?

• 1 : 2

• 30 : 60

• 2 : 1

• 60 : 30

Multiple Choice

# of teeth input gear = 25

# of teeth output gear = 75

What is the gear ratio (in lowest terms)?

• 3 : 1

• 1 : 3

• 25 : 75

• 75 : 25

Multiple Choice

# of teeth input gear = 20

# of teeth output gear = 80

What is the gear ratio (in lowest terms)?

• 80 : 20

• 1 : 4

• 4 : 1

• 20 : 80

Open Ended

answer question in picture

Open Ended

Describe two benefits of using a design process when solving a problem.

Open Ended

Describe what is happening in the following code.

Open Ended

Analyze and describe what is happening in the flowchart.

Open Ended

A group of interns is using the code below. They are not able to get print displays on their brain. Using the brain display, they have verified that the colored cubes are being detected, and the sensor is connected to the correct port. They know it must be a programming error, but they cannot find it. Help them identify the bug in their code, and explain how they can modify their program to see the colors printed to the brain.

Open Ended

How does the chain drive cause a bicycle to move forward?

Open Ended

How has your perspective of computer science changed throughout this course? Describe how your perceptions have changed or explain why your perceptions have not changed.

Open Ended

In this unit, you used the skills of collaboration, problem-solving, communication, and creative thinking. How might you use these skills in your daily life? How might you use these skills in your dream job?