Adog is walking at 2m/s and then begins to run at a speed of 6m/s. what is his acceleration if his total travel time is 2 seconds?

The formula for velocity vf = vi + at

First list your given information

2m/s Is your initial velocity (vi)
6m/s is you final velocity (vf)
2 seconds is your time (t)

Since you want the a for acceleration get a by itself

a = (vf-vi)/t

So a= (6-2)/2

a= 4/2

a=2

Now units

the units for acceleration are m/s

2m/s

Iknow the first part it is the average star i am not 100% sure