Acceleration is defined as the rate of change of velocity. In this case, the object starts from rest (initial velocity of 0 m/s) and gains a final velocity of 60 m/s in 3 seconds.
To find the acceleration, we can use the formula:
Acceleration (a) = (Final Velocity (v) - Initial Velocity (u)) / Time (t)
Substituting the given values into the formula:
Acceleration (a) = (60 m/s - 0 m/s) / 3 s
Acceleration (a) = 60 m/s / 3 s
Acceleration (a) = 20 m/s²
Therefore, the acceleration of the object is 20 m/s².