The Boston school compendium of natural and experimental philosophy .. (1837)
Parker, Richard Green, 1798-1869 · Boston : Marsh, Capen & Lyon · leaf 63
s. 169. Fpon what principle do pulleys act ? What advantage U <*ai<ieci by theuse of pulleys and other mechanical powers. What are s >me of t,:e practicaluses of th pulley >. What is a tackle and fall? Is there any time or velocitygained with the power in the mechanical powers ? To whar… … Fi-. 32. llhistration. T he wheel and axis, thoughmade in many forms,will easily be under-stood by inspecting fig-ures 31 and 3*2. In fig.31P represents the larg-er wheel where the pow-er is applied; C thesmaller wheel or cylin-der, which is generallycalled the axis, and Wthe weight to be…
Physics
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