Which robot system includes end effectors, grippers, joints, wheels, gears, bearings, and powertrain components that enable movement?

• A. Mechanical
• B. Structural
• C. Sensory
• D. Electrical

Answer: (A)

This question tests understanding of which robot system comprises the physical moving parts that enable motion. The items listed—end effectors, grippers, joints, wheels, gears, bearings, and powertrain components—are all mechanical hardware that directly moves or manipulates the robot. They form the moving, interacting parts that translate power into motion and enable interaction with the world. A structural subsystem is the rigid frame and supports the robot; sensory refers to perception and sensing capabilities; electrical covers circuits, power electronics, and control hardware. Because the described components are the actual moving, mechanical elements, the mechanical system is the best fit.