Correct capitalization in figure caption [closed]
This might be covered in the style guide you are following; that is, the style guide of which your chosen system of referencing is a part.
For example, in The Chicago Manual of Style, captions should be capitalized in "sentence style", meaning "only the first word in a title, the first word in a subtitle, and any proper names are capitalized". See section 3 in the manual.
Figure 23: Lateral moment vs time.