Division of vector quantities?

[mpusz]

Acceleration is a change of velocity over time (a = V / t). Acceleration and velocity are defined as vector quantities, whereas time is scalar.

If I want to calculate t = V / a, it is impossible if representation types of a and V are linear algebra vectors as it is impossible to divide two vectors. Additionally, the characteristics of a derived quantity of velocity divided by acceleration is vector as well so it will not allow assigning to a scalar time.

This is a simple and common case but also so complicated now after #405. How to handle that?