Notes and examples in mechanics; with an appendix on the graphical statics of mechanism; (1903)
Church, Irving P. (Irving Porter), 1851-1931 · New York, J. Wiley & sons; [etc., etc.] · leaf 113
104 NOTES AND EXAMPLES IN MECHANICS. Example 2. Fig. 118. (This form of frictiun-brake is some-times used in testing motors.) Since slipping ac-tually occurs^ we use eq. (3) of p. 183, M. of E., … ^.= ^>/«; i.e,> = ]og, r|].S^ = 20 lbs., S, = 10 lbs., with a ^ Here w^e put Tt, and obtain /= [2.302 X log,o(2.0)] - TT, zzz 0.22.Fig. 118. As to the power, Z, expended on the friction, we note that each element of the friction is overcome through a dis-tance V every second, where v is the…
