Theory of Machines (Introduction)

Definition: The subject Theory of Machines may be defined as that 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. the knowledge of this subject is very essential for an engineer in designing...
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Newtons First Law of Motion

Definition:It states ” Every body continues in its state of rest or of uniform motion in a straight line, unless acted upon by some external force.” This is also known as law of Inertia.
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Law of Inertia

Definition:It states ” Every body continues in its state of rest or of uniform motion in a straight line, unless acted upon by some external force.” This is also known as law of Inertia. The Inertia is that property of a matter, by virtue of which a body...
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Mass (Definition)

Definition: It is the amount of matter contained in a given body, and does not very with the change in its position on the earths surface. The mass of the body is measured by direct compraision with a standard mass by using a level balance.
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Weight

Definition: It is the amount of pull, which the earth exerts upon a given body. Since the pull verys with distance of the body from the centre of earth, therefore the weight of the body will very with its position on the earth surface (say latitude and elevation)....
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Momentum

Definition: It is the total possessed by a body. Mathematically, Momentum=Mass x Velocity Where: m = mass of the body u = initial velocity of body v = final velocity of a body a = constant acceleration t = time required (in seconds) to change the velocity from...
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Moment of Force

Definition: It is the Turning effect produced by a force, on the body, on which it acts. The moment of force is equal to the product of force and the perpendicular distance of the point about which the moment is required and the line of action of the...
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Mass Moment of Inertia

Definition: It has been established since long that a rigid body is composed of small particles. if the mass of every particle of a body is multiplied by the square of its perpendicular distance from a fixed live, then the sum of these quantities (for the whole body)...
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