resultant force

The resultant force is simply the sum of the total external forces acting on a body.

F_res = ∑ _i=1ⁿF _i = F₁ + F₂ + ...

Geometrically, the resultant force R of two forces P and Q is shown in Figure 1. The law of the parallelogram of forces states that given two vectors, the resultant force of using these vectors as sides to a parallelogram is the diagonal of the parallelogram.

References

[1] Brooke, William; Wilcox, Hugh. ”Engineering Mechanics”. Ginn and Company, Boston, 1929.
[2] Ling, Samuel et al. ”University physics”. Volume 1. OpenStax College, Houston, 2021.