**an object with zero velocity accelerates at 10m/s2. find its average velocity during the first 15 seconds**

**Answer:**

Average velocity is equal to (Vf + Vi)/2

Vf = final velocity Vi = initial velocity

Vo = 0 m/s

a (acceleration) = 10 m/s^2

t = 15 s

Vf = Vo + at

Vf = 0 m/s + (10m/s^2)(15s)

Vf = 0 m/s + 150 m/s

Vf = 150 m/s

therefore

Average velocity = (150 m/s + 0m/s)/2

Average velocity = (150 m/s)/2

Average velocity = 75 m/s