Final answer:
The unknown force acting on the object is 20 Newtons (N).
Step-by-step explanation:
In order to find the unknown force acting on the object, we can use Newton's second law of motion, which states that force is equal to mass multiplied by acceleration (F = m * a).
In this case, the mass of the object is 10 kg and the acceleration is 2 m/s². Plugging these values into the equation, we get F = 10 kg * 2 m/s² = 20 N.
Therefore, the unknown force acting on the object is 20 N.