is expressly stated. When two forces acting on a machine balance each other,one of them is for convenience called the power and the otherthe weight. 89. The Lever. A rigid rod or bar capable of turning about a fixedpoint of it is called a lever. The point about which it canturn is called the… … THE LKVEE. 107 We have seen in Art. 35, 36, that a body of any formcapable of turning about a fixedpoint 0 may be considered as alever, and if two forces P, Q actupon it in a plane passing through0, the lever will be in equilibriumif P. Op=:Q . Oq; i.e. if themoments of P and Q which tendto turn…
Mechanics
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