Chapter6MomentumCanwesolveconvenientlyallclassicalmechanicalproblemswithNewton’sthreelaws?No,theproblemssuchascollisions.ThisbusyimagewasrecordedatCERN(欧洲粒子物理研究所),inGeneva,SwitzerlandFourgalaxiescollidingtakenbyusingHubbleSpaceTelescope.Non-touchedcollisions6-1Howtoanalyzeacollision?Inacollision,twoobjectsexertforcesoneachotherforanidentifiable(可确认的)timeinterval,sowecanseparatethemotionintothreeparts.Before,during,andafterthecollision.Duringthecollision,theobjectsexertforcesoneachother,theseforcesareequalinmagnitudeandoppositeindirection.1)Weusuallycanassumethattheseforcesaremuchlargerthananyforcesexertedonthetwoobjectsbyotherbodysintheenvir...
