Lesson 3 - Force and Torque

As you already know, the subject of mechanics is mechanical interaction between bodies. This interaction needs to be evaluated and measured somehow, since it has some intensity, area of application, direction. For this purpose the concept of "Force" is introduced. Force is a measure of power interaction between the bodies. This interaction occurs when bodies come in contact with each other.

Force is represented with a vector. This means, it has a magnitude (length), direction, line of impact and application point.