|THERMO Spoken Here! ~ J. Pohl © ~ 2017||www.ThermoSpokenHere.com (A4339-042)|
Typical vectors for a BODY (as system) are its spatial properties: position and velocity (also acceleration). The gravity force and sum of surface (or external) forces, ΣF, are vectors. The figure shows a BODY in 0XZ-space with a notation for its vectors.
Details of the figure are:
Beginners might think there is too much notation. Sketches that retain the physicality of physical situations require careful, consistent graphical notation. Notations are learned not so much for simple problems; they are learned as preparation to understand and solve more difficult problems.