**ME6505 DOM Notes**

Anna University Regulation 2013 Mechanical Engineering (MECH) ME6505 DOM Notes for all 5 units are provided below. Download link for MECH 5th SEM ME6505 DYNAMICS OF MACHINES Lecture Notes are listed down for students to make perfect utilization and score maximum marks with our study materials.

** ME6505 – DYNAMICS OF MACHINES**

UNIT – I – Force Analysis

(1) **Introduction**: If the acceleration of moving links in a mechanism is running with considerable amount of linear and/or angular accelerations, inertia forces are generated and these inertia forces also must be overcome by the driving motor as an addition to the forces exerted by the external load or work the mechanism does.

(2) **Newton’s Law**: First Law Everybody will persist in its state of rest or of uniform motion (constant velocity) in a straight line unless it is compelled to change that state by forces impressed on it. This means that in the absence of a non-zero net force, the center of mass of a body either is at rest or moves at a constant velocity. Second Law A body of mass m subject to a force F undergoes an acceleration a that has the same direction as the force and a magnitude that is directly proportional to the force and inversely proportional to the mass, i.e.,** F = ma**.

Alternatively, the total force applied on a body is equal to the time derivative of linear momentum of the body. Third Law The mutual forces of action and reaction between two bodies are equal, opposite and collinear. This means that whenever a first body exerts a force F on a second body, the second body exerts a force −F on the first body. F and −F are equal in magnitude and opposite in direction. This law is sometimes referred to as the action-reaction law, with F called the “action” and −F the “reaction”

(3) **Types of force Analysis:**

- Equilibrium of members with two forces
- Equilibrium of members with three forces
- Equilibrium of members with two forces and torque
- Equilibrium of members with two couples.
- Equilibrium of members with four forces.

(4) Principle** of Super Position**: Sometimes the number of external forces and inertial forces acting on a mechanism are too much for graphical solution. In this case we apply the method of superposition. Using superposition the entire system is broken up into (n) problems, where n is the number of forces, by considering the external and inertial forces of each link individually. Response of a linear system to several forces acting simultaneously is equal to the sum of responses of the system to the forces individually. This approach is useful because it can be performed by graphically.

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