A robot capable of moving its hand left and right and rotating it 360° has how many axes of motion?

• A. One
• B. Two
• C. Three
• D. Four

Answer: (B)

The correct answer indicates that the robot possesses two axes of motion. In the context of robotics, an axis of motion refers to a specific direction in which a moveable part can move.

For the robot described, the capability to move its hand left and right represents one axis of motion, which can be thought of as lateral or horizontal movement. Additionally, the ability to rotate the hand 360° constitutes a second axis of motion. This rotation allows the hand to turn around a point, providing another dimension of movement.

While an option with three or more axes would involve additional movements—such as moving up and down or extending—these motions are not present in the description provided. Hence, the specific capabilities of moving side to side and rotating result in a total of two clear axes of motion.