Coding
Ten80 RC Cars
Hydraulics & Pneumatics
VEX Robotics
Miscellaneous
100
What is the default velocity for the VR Robot?
50%
100
What should the voltage be for your RC car battery if is is FULLY charged?
~8 V
100
Which produces higher pressure and more force?
Hydraulics
100
Identify the part
sprocket
100
Describe the scoring of drag race, including how penalties were awarded.
-Fastest time wins
-disqualified if you left your lane
-driver must stay in driver box -0.20 s penalty
-car must stop in stopping box -0.20 s penalty
200
What is a Boolean condition in coding?
An expression that will be either true or false.
200
What do you turn on first? RC Car or Remote Control
Remote Control
200
What is the mechanical advantage of this hydraulic system?
MA = F2/F1 = 40 kg/10 kg = 4
200
How many points of contact should an axle have with the main structure of the robot?
2
200
Describe the scoring of Swept Away
Most points in 2 minutes wins
+ 3 for footballs
+ 1 for soccer balls
+3 for soccer balls in goals
300
What type of values can the [Repeat] block accept as parameters?
Positive integers
300
Identify the part
-oil filled cylinder with a piston
Shock
300
Is the mechanical advantage of this hydraulic lift > or < 1? Explain your answer.
The mechanical advantage of just the hydraulic system appears to be 1 = same area in as out.
However, it is lifting a 2nd class lever (if weight is put in the middle) that will have a mechanical advantage >1, so the build as a whole as a MA > 1
300
Identify the part.
Cortex
300
Explain the value of using sensors on vehicles and other devices and including them in programs.
Sensors can detect a changing environment. "Smart" codes include sensors so they can adapt when the environment changes.
400
How did you use the Bumper Sensor in writing code for the Wall Maze?
To instruct the robot to turn when it bumped into a wall
400
Identify the part:
-attaches to the shaft of the electric motor and meshes
with larger spur gear
Pinion gear
400
What must A1 be in order for a 10 lb force to lift a 2,000 lb object if A2 is 10 m2?
F1/A1 = F2/A2
10/A1 = 2,000/10
A1 can be 0.005 m2 or less
400
Identify the part. Describe its purpose.
Bearing flat.
Reduces friction for an axle
400
What is the voltage of a fully charged AA battery?
What is the name of this device?
> 1.5 V
Multimeter
500
Name two sensors on the VR Robot and describe what they "sense".
- Two Eye Sensors, one that faces forward, and the other down. These sensors can detect if there is an object present. If there is, the sensor can also detect the color (red, green, blue, none).
- A Location Sensor that reads (X,Y) coordinates from the center turning point of the VR Robot
- The front facing Eye Sensor also acts like a distance sensor and returns the distance of a detected object in mm and inches.
- A Gyro Sensor that is built into the Drivetrain. Clockwise is positive.
500
Identify the parts:
a. posts with clips where you attach the car body
b. platform on which the internal parts sit
c. get commands from the transmitter and sends them to different devices
a. body mount
b. chassis
c. receiver
500
State 2 comparisons and 2 differences between pneumatics and hydraulics.
Compare: fluid structures - work on pressure; both increase output force; both use pumps & valves
Contrast: air vs. liquid; less force vs. more force; clean vs. dirty; cheaper vs. more expensive; no fire risk vs fire rish
500
Identify the parts and describe their function:
1.
2. 
3.
1. rivet: secure a bearing to the structure
2. nylock nut: prevent loosening due to vibrations
3. stand off: rigid separation of cross beams to put gears or wheels
500
What were three of the sponsors for Ten80?
