Final answer:
The term 'speed(n)' in the context of ball bearings refers to the rotational velocity, represented by angular velocity with units of rad/s, which is related to the tangential speed of a point on the bearing.
Step-by-step explanation:
In the context of ball bearings, the term "speed(n)" represents rotational velocity, which is the angular speed or rate of change of the angular displacement with time. The linear velocity has units of m/s, while its rotational counterpart, angular velocity, has units of rad/s. For an object in circular motion, such as a ball bearing, the tangential speed of a point on the object is directly related to the angular velocity and the radius of the motion. The formula for tangential speed is ut = rw, where ut is the tangential speed, r is the radius, and w is the angular velocity.