Question

do we have to put an arrow above a vector symbol?​

Answer 1

Answer:

yes ...arrow shows that it is a vector quantity

Answer 2

Usually, it's fine to not have an arrow over your vectors as long as you define that they are vectors. Although in any case, really, you should define it to be a vector with or without an arrow. Once you say "Let v be a vector" then no arrow is needed.

please mark this as brainliest