An elementary treatise on MechanicsMacmillan, 1863 - 374 σελίδες |
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Σελίδα 26
... perpendicular to it , the algebraic sum of the former resolved parts will be = R , and of the latter will be = 0 . COR . 2. If such a system of forces as is considered in this Article is in equilibrium , the resultant must be zero ...
... perpendicular to it , the algebraic sum of the former resolved parts will be = R , and of the latter will be = 0 . COR . 2. If such a system of forces as is considered in this Article is in equilibrium , the resultant must be zero ...
Σελίδα 30
Stephen Parkinson. Op perpendicular to AB , and if m , n be the number of linear units in AB , Op respectively , then will mn be the moment of P about O , or about an axis through O perpendicular to the plane 0 ABO . Also since the area ...
Stephen Parkinson. Op perpendicular to AB , and if m , n be the number of linear units in AB , Op respectively , then will mn be the moment of P about O , or about an axis through O perpendicular to the plane 0 ABO . Also since the area ...
Σελίδα 33
... perpendicular to this plane , -their directions meeting it in the points R , P , Q. Draw Pp , Rr , Qq per- P R pendicular to Opq - then if the line Opq is parallel to PQ , these perpendiculars are equal , and — since R = P + Q — the ...
... perpendicular to this plane , -their directions meeting it in the points R , P , Q. Draw Pp , Rr , Qq per- P R pendicular to Opq - then if the line Opq is parallel to PQ , these perpendiculars are equal , and — since R = P + Q — the ...
Σελίδα 42
... perpendicular to OR t cos pOR = t ' cos q OR ; but qOR = pOR , ..t = t ' ; i.e. the tension at successive elementary distances is the same , and therefore it is so at finite distances . Hence if the string be pulled by forces T , T " at ...
... perpendicular to OR t cos pOR = t ' cos q OR ; but qOR = pOR , ..t = t ' ; i.e. the tension at successive elementary distances is the same , and therefore it is so at finite distances . Hence if the string be pulled by forces T , T " at ...
Σελίδα 58
... perpendicular to it , = W sin & = μR , W cos = R ; φ whence tan μ . Hence if & be observed , the value of μ is known . The angle friction . is commonly called the angle of 58. The above can only be regarded as an approximate method of ...
... perpendicular to it , = W sin & = μR , W cos = R ; φ whence tan μ . Hence if & be observed , the value of μ is known . The angle friction . is commonly called the angle of 58. The above can only be regarded as an approximate method of ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
accelerating force angular points applied axis balance ball bisects body or system centre of gravity circle coefficient of friction conditions of equilibrium cos² curve cycloid cylinder determine diagonal distance elastic equal particles equation equi find the centre fixed point forces acting fulcrum funicular geometrical given heavy particles Hence horizontal plane impact inclined plane latus rectum length lever librium magnitude and direction mass middle point moving parabola parallel parallelogram parallelogram of forces parallelopiped Pcos perpendicular polygon position of equilibrium pressure pully pyramid radius represented resolved rest resultant right angles rough shew sides similar triangles sin² sliding smooth sphere straight line string passes student suppose surface system of forces system of particles tangent tension theorem three forces tion triangle uniform vertex vertical plane virtual velocity W's virtual weight
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Σελίδα 15 - If two forces acting at a point be represented in magnitude and direction by the...