Final answer:
To determine the projection of the force acting in the direction of the cable ac, you can use vector projection.
Step-by-step explanation:
The projection of the force acting in the direction of the cable ac can be determined by finding the component of the force that is parallel to the cable. This can be calculated using vector projection. The formula for vector projection is given by:
Projection of vector A onto vector B = (A · B) / |B|
In this case, the force vector is projected onto the direction of the cable ac. The resulting projection will give you the part of the force that is acting in the direction of the cable ac.