The apprentice, or First book for mechanics, machinists, and engineers (1860)
Byrne, Oliver · New York, P. J. Cozans · leaf 40
^=^=>- T Q Ques. 6. In a combina- tion of three levers of thefirst order, represented on ^ 9 -^—7 3-—8—yt tl^^ accompanying diagram, A the long arms are 9, 7, 8,inches respectively, the short arms 2, 3. 1 inches ; If a pres-sure of 10 lbs. be applied at P, what is the pressure at Qto balance it… … Ques. 7. Let P F and F W be the arms of a false balance,a certain weight Q weighs 16lbs., when put in the scale at-tached to the long arm, andonly 9 lbs. when weighed inthe opposite scale ; what isthe true weight of Q ? By the equality of moments, the two following equations are ob-tained. QXWF =…
Mechanics, Applied
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