Originally Posted by

**magentarita** One force of 20 pounds and one force of 15 pounds act on a body atthe same point so that the **resultant force** is 19 pounds. Find, to the nearest degree, the angle between the two original forces. **To solve this, we would need to apply the **__Law of Cosines__. We can set up a triangle that is not a right triangle, where all three sides are given.

What exactly is the** resultant force** anyway? **A resultant force is a single force that can be used to represent a number of different forces acting at the **__same__ point on an object. Resultant forces are used in engineering and physics [mechanics] to simplify calculations when analyzing forces using free body diagrams [force analysis diagrams].

My teacher stated that this question can be solved without the use of vectors.

Can someone explain this in detail?