swivel
axle
retrograde
roll
Answer is Right!
Answer is Wrong!
The correct answer is: B. axle
An axle is a central shaft or pin on which a wheel or other rotating object is mounted. In a robot arm, the axle is the part that allows the arm to rotate around its joints.
The other options are incorrect because:
- A swivel is a joint that allows a part to rotate freely in all directions.
- Retrograde is a term used to describe the motion of an object that is moving in the opposite direction to the Earth’s rotation.
- Roll is a type of motion that occurs when an object rotates around its long axis.