Final answer:
The acceleration of the object is -3 m/s².
Step-by-step explanation:
The acceleration of an object can be found using the formula:
acceleration = (change in velocity) / (time)
In this case, the object's initial velocity is 10 m/s and it undergoes acceleration for 6 seconds. The object's final velocity is not mentioned, but if it moves 8 m to the left, we can assume that the final velocity is -8 m/s (negative because it's moving to the left).
Using the formula, the acceleration can be calculated as:
acceleration = (-8 m/s - 10 m/s) / 6 s = -3 m/s²