Analytical mechanics, comprising the kinetics and statics of solids and fluids (1911)
Barton, Edwin Henry · London, Longmans · leaf 326
But the resultant is represented by the line whichcloses the polygon, whose sides represent the forces as if placed end toend. Hence for equilibrium this closing side must vanish, or thepolygon of forces must be itself closed. We may also give the same ideas in analytical form. Thus, letforces Fly… … since the resultant R is given by and accordingly only vanishes when (1) is satisfied. 316. Inclined Plane.—Let us now consider the equilibrium of aparticle on a rough inclined planeunder the action of a force at anangle with the plane. Let the weightof the particle be W, the coefficientof friction…
Mechanics
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