I often create diagrams to illustrate the scenario of an exercise for my students. These are not necessarily free-body diagrams, as creating those may be part of the task or similar or it would be overkill. In such diagrams, I can use straight arrows to indicate that a body is moving in a certain direction and circular arrows to indicate rotation. Is there an established equivalent way to indicate that an object is at rest?
I am interested in notations for both linear and rotational motion that can be used separately (so I can indicate that a linearly moving body is not rotating and vice versa). My bar for established is pretty low, I am happy about anything used by a textbook or proposed in a scientific or didactic journal. It just shouldn’t be an ad-hoc idea to answer this particular question.
What I am mostly using so far is to write $\vec{v}=0$ or similar next to the body, however this has some disadvantages in my opinion:
It is considerably more complex and requires more space than a simple symbol like the arrow for motion.
It is inconsistent if I do not use an analogous notation for other moving objects. For example, if I use $v=0$ for a resting object, it is weird that I do not use $v=1\,\frac{\text{m}}{\text{s}}$ for another moving object in the same diagram.
If I have multiple resting objects in the same diagram, I would need to use $v_1 = 0$, $v_2=0$, etc. to be precise.
Making the step from body at rest to $v=0$ is among the (very basic) things my students should learn to do by themselves.
