Analytical mechanics for students of physics and engineering (1913)
Dadourian, Haroutune Mugurditch, 1878- · New York, D. Van Nostrand Company · leaf 186
he latter view, letdF be the resultant force* acting upon the element of massdm. Then since dm can move only at right angles t<> theline r, which joins it to the axis, dF must be perpendicularto r. When the body is given an angular displacement do,dm is displaced through ds, therefore the… … Fig. 94. 170 ANALYTICAL MECHANICS where dG is the moment of dF about the axis. Thus thetotal work done by all the forces acting upon all the elementsin producing the angular displacement dd is dW= f dG dd - do f°fir ^0 is the same for every Jo element of mass.) = Gdd, where G is the sum of the…
Mechanics, Analytic
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