The net force acting on an object is the vector sum of all the forces acting on it. In this case, the object is moving with a velocity of 2 m/s to the right, and a force of SN (assuming you meant N for Newtons) is applied to the left.
Since the force is applied in the opposite direction of the object's motion, we can consider it as a force acting in the negative x-direction. In this case, the force is -SN.
To calculate the net force, we need to consider both the force applied and the object's motion. In this case, the net force can be calculated as:
Net Force = Applied Force + Force due to Motion
The force due to motion is determined by multiplying the mass of the object by its acceleration. Since the object's velocity is constant (2 m/s), its acceleration is zero. Therefore, the force due to motion is zero.
Applying the formula:
Net Force = -SN + 0 = -SN
Therefore, the net force acting on the object is -SN (in the negative x-direction).