Hi simple question which of these have the dimension as length?

Question

A) a*t^2
B) v^2/2*a
C) a*v
D) (v^2*m)/F

Answer 1

a= m/s^2
v=m/s
t

so A is m/s^2 * s^2= m

can you do the rest?
On the last, for F, kg*m/s^2 is the units.

Answer 2

Still so confused @_@.
Does the dimension as length mean, when calculated the answer = length?

Answer 3

I would do dimensions in meters (m), using the symbols m, m/s, m/s^2 for length, velocity, acceleration. Mass is kg.