PDF-Mechanics2.12.Pulleysmc-web-mech2-12-2009Variousmodellingassumptionsar
Author : natalia-silvester | Published Date : 2015-08-14
Fma onparticleBinthedirectionofmotiongives8gT8a1UsingNewtonssecondlaw Fma onparticleCinthedirectionofmotiongivesT2g2a2 TTBC Thesimultaneousequations1and2cannowbesolved
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Mechanics2.12.Pulleysmc-web-mech2-12-2009Variousmodellingassumptionsar: Transcript
Fma onparticleBinthedirectionofmotiongives8gT8a1UsingNewtonssecondlaw Fma onparticleCinthedirectionofmotiongivesT2g2a2 TTBC Thesimultaneousequations1and2cannowbesolved. F=R Mgsin=MgcosMgsin Mgcos=tan=Note:tan=sin cos MgRF q Figure1Thiscanbewrittenas=arctan;isreferredtoasthe AngleofFriction .WorkedExample2.Aboxofmass6kgisonthepointofslippingdownaroughs rough horizontalplane.GivenahorizontalforceofmagnitudeSisapplied(asinFigure1),thenassumingtheparticleremainsinequilibrium,themagnitudeofthe frictionalforce ,F,opposinganymotion,willbeequaltoS,i.e.F=S. Nature of science: . Observations: The ideas of motion are fundamental to many areas of physics, providing a link to the consideration of forces and their implication. The kinematic equations for uniform acceleration were developed through careful observations of the natural world.. Nature of science: . Theories: Many phenomena can be fundamentally understood through application of the theory of conservation of energy. Over time, scientists have utilized this theory both to explain natural phenomena and, more importantly, to predict the outcome of previously unknown interactions. The concept of energy has evolved as a result of recognition of the relationship between mass and energy..
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