a dog chasing a ball

Question

a dog chasing a ball starts at rest and accelerates uniformly over a distance of 5 meters. it takes the dog 1s to cover that first 5m. What is the dogs acceleration, and what speed is the dog traveling when it reaches the 5m point?

Answer 1

Since the dog accelerates uniformly and he started from rest, he travels 5 meters per sec every second, or 5 m/s².

Velocity can be calculated from v_f = v_i + at = 0 + 5(1) = 5 m/s but you really don't need the equation in this case.