Answer: 3.33 m/s^2
Explanation:
The definition of acceleration is the change of velocity in the time.
Since the information given does not include direction, the acceleration is calculated as tha change in speed, assuming that there is not change in direction.
So, to calculate the acceleration use the formula:
change in speed Final speed - initial speed
acceleration = --------------------------- = -------------------------------------
time time
14 m/s - 4 m/s 10 m/s
acceleration = ---------------------- = ------------- = 3.33 m/s/s or 3.33 m/s^2
3s 3s
