Final answer:
The force moving the box along the ground is approximately 15.588 N.
Step-by-step explanation:
To calculate the force moving the box along the ground, we need to resolve the applied force into its components. The horizontal component of the force will be responsible for moving the box along the ground.
Using trigonometry, we can find that the horizontal component of the force is given by:
Force parallel to the ground = Force * cos(angle)
Substituting the given values, we get:
Force parallel to the ground = 18 N * cos(30°)
Simplifying, we find that the force moving the box along the ground is approximately 15.588 N.