Force gauge
Test units of force measurements are most commonly newtons or pounds. The peak force is the most common result in force testing applications. It is used to determine if a part is good or not. Some examples of force measurement: door latch, quality of spring, wire testing, strength ... but more complicated tests can be performed like peeling, friction, texture.
Net force
A force is known as a bound vector—which means it has a direction and magnitude and a point of application. A convenient way to define a force is by a line segment from a point "A" to a point "B". If we denote the coordinates of these points as A=(A, A, A) and B=(B, B, B), then the force vector applied at "A" is given by
The length of the vector B-A defines the magnitude of F and is given by