Final answer:
The magnitude of the projection of a force along a cable can be determined using the dot product between the force vector and the unit vector in the direction of the cable.
Step-by-step explanation:
The magnitude of the projection of a force can be determined using the dot product between the force vector and the unit vector in the direction of the cable. Let's assume the force vector is F and the unit vector in the direction of the cable is u. The magnitude of the projection of the force F along the cable ba can be calculated as:
|F_proj| = |F| ∙ |u| ∙ cos(θ)
where θ is the angle between the force vector F and the cable ba. To find the actual value of the magnitude, we need specific information about the force vector F and the cable ba.