Name three common sensors used on VEX robots and their typical function.

• A. Gyro sensor for orientation; Encoder for rotation/position sensing; Distance sensor for detecting proximity or range.
• B. Ultrasonic sensor for color detection; Gyro for speed; Light sensor for weight measurement.
• C. Proximity sensor for altitude; Temperature sensor for orientation; Encoder for color.
• D. Pressure sensor for distance; Gyro for wind direction; Tachometer for torque.

Answer: (A)

Sensors on VEX robots provide feedback that the control system uses to move correctly and avoid collisions. Three common ones are the gyro sensor, which measures orientation or heading and helps you turn to precise angles and maintain a stable direction; the encoder, which tracks rotation of a wheel or shaft to determine how far the robot has moved and how fast it’s turning; and the distance sensor, which detects how far away an object is, enabling obstacle detection and range sensing. This mix covers angular orientation, rotary position/speed, and proximity, giving a well-rounded set of feedback for typical robotics tasks. Other options mix up what the sensors measure—such as using a gyro for speed or a device intended for color or altitude measurement—so they don’t align with how these sensors are actually used.