1. Robots in the Real World

A robot is more than a machine that moves. It senses its surroundings, makes decisions from information, and uses motors or other tools to act. Seeing robotics as a loop of sensing, thinking, and acting makes everything from a vacuum robot to a Mars rover easier to understand.

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Use what you learned in the previous lesson to solve real-world problems.

Robots often work in places that are dangerous, repetitive, tiny, distant, or difficult for people to reach. Cameras can help a robot recognize objects, wheels can carry it across rough ground, and precise arms can assemble products or assist with surgery.

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A small change in a robot’s instructions can produce a surprising change in its behavior. A robot may need to plan around obstacles, balance while moving, or choose a safe action when its sensors are uncertain. These challenges connect geometry, physics, programming, and artificial intelligence.

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Robotics brings many kinds of people together: mechanical engineers design bodies and joints, electrical engineers build sensing and control systems, and programmers create behavior. Students and hobbyists can also build line-following robots, robot arms, autonomous vehicles, or teams that compete in robot challenges.

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Review this chapter with practice based on your mistakes.