Final answer:
The net force is calculated by adding together the tension and weight forces, and then subtracting the friction force. In this case, the net force is 20000N (tension) + 12000N (weight) - 5000N (friction), resulting in a net force of 27000N.
Step-by-step explanation:
To find the net force acting on an object, we must take into account all the individual forces and their directions. In this case, we have two main forces acting in one direction which are tension and weight, and friction acting in the opposite direction. The tension is given as 20000N, the weight as 12000N, and the friction as 5000N.
The net force can be calculated as the sum of force vectors in a particular direction. To calculate the net force when the object is subject to these three forces, you add the forces working together and subtract the force working in the opposite direction:
Net Force = Tension + Weight - Friction
The net force can be calculated as:
Net Force = 20000N + 12000N - 5000N
Net Force = 27000N
Therefore, the net force acting on the system is 27000N.