Question

how many physical quantities are related in first equation of motion? name them giving their symbol.

Answer 1

v=u+at
v=final velocity
u= initial velocity
a=acceleration

Answer 2

There are four physical quantities related in the first equation of motion.
First equation of motion is v=u+at
v is the starting velocity.
u is the final velocity.
a is the acceleration ( the rate of change of velocity of a body with time)
And t is the time.
Hope you find it right