Answer:
Magnitude and direction of the net force acting on the body
Step-by-step explanation:
The free body diagram of a moving object shows all the forces acting on the object. In particular, every force is represented by an arrow, whose length is proportional to the magnitude of the force and whose direction represents the direction of the force.
Therefore, from a free body diagram it is possible to estimate the net force. In fact, by analyzing separately the forces acting along the horizontal direction and the forces acting along the vertical direction, one can estimate the net force acting in each of the two directions. Then, these two forces represent the components of the resultant force (net force) acting on the object.