When we design an automation device, it is necessary for us to understand the force, action and moment of the resultant force, as well as the acceleration of the motion and its effects. In this category, we will learn about mechanical engineering and automation device design.

(1)Mechanical devices and mechanics

A mechanical device is comprised of the following components:

The last two units mentioned here are the mechanical components strongly related to static mechanics without involving motion. Understanding forces, resultant forces, or resolution of forces will improve design quality of the mechanical components.

(2)Force and its expression

- When a force is applied to an object, it changes the state of an object from rest to motion or vice-versa.

- When a force is applied, it changes the motion state of an object or causes the object to deform.

- The state of force is expressed by the point of application and the line of action indicating the force direction. The magnitude of force is expressed by the length of the line of action. The arrow indicating all of these elements is called a "vector".

- Symbol N (Newton) indicates the magnitude of force. 1 N is equal to the force needed to accelerate a 1 kg mass at a rate of 1 m/s².

(3)Composition of forces

- In general, multiple forces are applied to a mechanical component. The effect of these forces combined can be expressed as the single force. The combined force here is called a "resultant force".

Resultant force along the same line of action