GPS原理.pptChapter4&5NewtonianMechanicsNewton’sLawSomeParticularForcesTheDynamicsinNoninertialFrameApplyingNewton’-’sLawonMotion(P78)forceactsonabody,thenthebody’svelocitycannotchange;elerate(任何物体都保持静止或匀速直线运动状态,直到作用在它上面的力迫使它改变这种状态为止).Supplementaryexplanation:’sfirstlaw—inertiallaw1)TheconceptofInertia(惯性):haracteristicofabody,)Inertialreferenceframes(IRF)(惯性参考系):AninertialframeisoneinwhichNewton’):Aninteraction—–’ssecondlawUnitanddimension:newton(N)1N=1kg·m/s2[MLT-2]rtpFddr=Soinclassicalmechanics,itcanbeexpressedas:whereismomentum(动量)’sinstantaneousinteraction(瞬时作用规律).,andparticlesorparticle-,afree-:-IILaw:—–ponentsalongthatsameaxis,ponentsalonganyotheraxes(力的独力性原理或力的叠加原理).,theresultantforceshouldbe:’sthirdlawHey!Thethird-:1)Simultaneous;2)Sametypeofforce;3)Actingondifferentbodies,-(P134&85)Newton’sformofthelawofgravitation(万有引力):AccordingtotheNewton’sassumption:F1∝MmandF2∝mMandincludetheinversesquarelawcondition,(universal)(万有引力常量)rmMo9Forabodyontheground,ofmassm,mMRywhereisalsocalledgravitationalforce(重力)——aspecialcaseofgravitation(万有引力).Themagnitudeof(thegravitationalforceonthebody)
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