The Theory of machines is the branch of Engineering-science, which deals with the study of relative motion between the various parts of a machine, and forces which act on them. In this branch of engineering-science, we will deal with the kinematics and the dynamics. In this article, we have given the small glimpse of what is Kinetics, Kinematics, Dynamics, Statics with the definitions.

## Theory of Machines

The theory of Machines is further sub-divided into the following branches.

- Kinematics
- Dynamics
- Kinetic
- Statics

### Kinematics

This study of kinematics deals with the relative motion between the various parts of the machines.

### Dynamics

Dynamics deals with the forces and their effects while acting upon the machine parts in motion.

### Kinetic

This study of kinetics deals with the inertia forces which arises from the combined effect of the mass and the motion of the machine parts.

### Statics

Statics deals with the forces and their effects on the machine parts at which these machine parts are at rest. The mass and the inertia forces of the parts are assumed to be negligible.

We have a few other definitions that we must understand before we are going to discuss the subject theory of machines.

#### What is the relative motion?

Relative motion is the calculation of the motion of an object with respect to some other moving object.

An example might help you understand it clearly. When you sitting ideally on a bus, you will be moving with the same velocity as the bus with respect to the ground. In the relative motion concept, we can calculate the relative velocity and relative speed and relative acceleration.

#### What is a mechanism?

A mechanism can be defined as the combination of the kinematic links joined together and capable of having relative motion with respect to each other.

Whereas the machine is defined as the combinations of such mechanisms together called as the machine.

## Conclusion

We have discussed the definitions of Kinetics, Kinematics, Dynamics, Statics. Also, we have discussed some few other important definitions in the theory of machines to get started. If you have any further thoughts on this topic, let us know in the comment section below.

robert eligman says

If you want to learn more about the basics of kinematics, dynamics and motion, check any college physics textbook. An algebra/trig based book such as Giancoli is very good. A calculus based texted shows how these equations are derived. Both should have a large sample of problems.