Acceleration is defined as the rate of change of velocity over time. In this case, we can calculate the acceleration for both the turtle and the ant by dividing the change in velocity by the time taken.
For the turtle: Acceleration = (Final velocity - Initial velocity) / Time taken Acceleration = (12 m/s - 0 m/s) / 2 s Acceleration = 6 m/s²
For the ant: Acceleration = (Final velocity - Initial velocity) / Time taken Acceleration = (25 m/s - 0 m/s) / 4 s Acceleration = 6.25 m/s²
Comparing the accelerations, we find that the ant has the greatest acceleration with an acceleration of 6.25 m/s².