# Introduction of Kinematics of Machines

### Introduction of Kinematics of Machines

The subject Kinematics of Machines also known as KOM is a very special course for the Mechanical Engineers. This course tells us about the distinctive features of the machines. This tells us how the machine works. In this course, we will study about the working of the machines. How they work? What would be the speed of output is some input speed is given. What would be the acceleration and so on.

So there are two parts, one is kinematics and the other part is machines. First we tell about the kinematics.

Kinematics:

Kinematics is the branch of mechanics which tells us about the motion without considering the cause of motion. In this portion, we study the displacement, speed and acceleration without bothering about the input force or torque.

Dynamics:
In this, we study about the effect of force and torque on an object. We study about the output velocity, acceleration, when the input torque or force is given.
Prerequisite for the course:
You should have the knowledge of following items before starting this course:

1. Vectors
2. Concepts of displacement, velocity and acceleration
3. Basic mechanics.
4. And some part of engineering graphics.

Machines:

The main part of this course is the study of machines. A machine is a tool which converts one form of energy to some useful work. For example an engine converts thermal energy into mechanical energy. So the engine would be a machine. A lathe machine converts electrical energy into some useful mechanical work, so it is a machine.

Although, we will discuss the machine in detail in later part of the tutorials, but the basic definition is “A machine is a combination of rigid or resistant bodies, formed and connected do that they move with definite relative motions and transmit force from the source of power to the resistance to be overcome. A machine has two functions: transmitting definite relative motion and transmitting force.  These functions require strength and rigidity to transmit the forces.”

Summary:

A machine is a device by means of which available energy can be converted into desired form of useful work.

The Theory of Machines is that branch of mechanical engineering which deals with the relationships between the geometry and motions of the parts of a machines and the forces which produce this motion.

The study of the relative motion between the parts is known as kinematics, while the study of the forces which act on the parts is known as dynamics.

Kinematics of Machines:

Kinematics is the study of motion, apart from the forces which produce that motion. It is a branch of Theory of Machines which deals with the study of relative motion of various elements of machine without taking into consideration the forces which act upon them.