Question

You start from rest and ski down a hill with an acceleration of 2 m/sec2. whats the speed at the following times

Answer 1

V=at + V0
V0 is the speed you begin with, in this case, you start ski down, so the it's zero m/s.
a is the acceleration, 2 m/s2.
So V = 2t
Don't forget that you should write the time in seconds, in the place of t.