Final answer:
The net force acting on an object can be calculated by subtracting the frictional force from the applied force. In this case, the net force is 6789 N (applied force) - 451 N (frictional force) = 6338 N.
Step-by-step explanation:
The subject of this question is net force, which is a concept in Physics. Net force is the sum of all the forces acting on an object. If an object is subjected to several forces concurrently, the net force is the vector sum of these forces. In this scenario, we have an applied force of 6789 Newtons opposing a frictional force of 451 Newtons. To calculate the net force, you subtract the frictional force from the applied force. So, 6789 N - 451 N = 6338 N. Therefore, the net force acting on the object is 6338 N, so Option 1 is the correct answer.
Learn more about Net force