Titlebook: Basic Engineering Mechanics; J. H. Hughes,K. F. Martin Textbook 1977Latest edition J. H. Hughes and K. F. Martin 1977 engine.engineering m

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fidelity

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Centres of Gravity and of Mass: Centroids,n the mechanics of rigid bodies when we are led to define certain quantities that are representative of the body as a whole. For example, we have already used the result that the ravitational forces on the individual particles of a rigid body reduce to a single force acting at some well-defined poin

DAFT

evanescent

,Kinetics of Particles and Particle Systems , — Integrated Forms,e system. Having expressed the acceleration components in terms of the external force components, we could obtain the velocity and position of a particle or of the mass-centre of a particle system at some specified instant — given the initial conditions. Conversely we were able to determine the resu

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Kinematics of Rigid Bodies,and obtain significant equations relating to the kinetics of such systems. In this and the following chapters we apply the equations to rigid bodies, since engineering interest centres on particle systems of this particular kind. We first discuss the kinematics of rigid bodies, recalling that a rigi

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Moments of Inertia,a particular axis. The summation symbol implies the addition of all the products indicated over the complete rigid body, and is termed the . with respect to the particular axis, which is then signified by a double subscript. For example I. is used to signify the moment of inertia about the .-axis th

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Kinetics of a Rigid Body,acceleration of the mass centre to the external forces through equations 9.9, namely . Given the external forces we were able to calculate, for a rigid body, the magnitude and direction of the acceleration of this one point, the mass centre. We were careful to note that these equations did . imply t

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