Ch.5:ForceandMo▯on-I A. ChapterGoals st nd rd • StudyofwhatareNewton’s1 ,2 ,and3 lawsofmo▯on • Studyofwhataretheforce,netforce,mass,andweight • StudyofhowtoapplyNewton’slawstosolvephysical problems Ch.5:ForceandMo▯on-I B.Newton’sFirstLawofMo▯on • Ifnotforceactson,anobjectcannotchangevelocityor cannotaccelerate. • Inotherwords,arestbodykeepsrestandamovingbody keepsthemo▯onwiththesamevelocity Ch.5:ForceandMo▯on-I C.Force • Anyinfluenceorac▯ononanobjectthatcausestheobject tochangevelocity.Forinstances:push,pull,etc. • Itisavector F withunit:Newton(N) Ch.5:ForceandMo▯on-I • FourFundamentalInterac▯onsofNature 1. Gravita▯onalforces 2. Electromagne▯cforce 3. Weakforce 4. Strongforce Ch.5:ForceandMo▯on-I Ch.5:ForceandMo▯on-I • NetForce: Netforceistheunbalancedforce,canbeobtainedby combiningallforces       F F4 F = F1+F +2 +.3.... 1 ▯  F 2 F3 Ch.5:ForceandMo▯on-I • Iner▯alReferenceFrame: Aframe,inwhichanobjectdoesnotaccelerateifnonet forceactsonit. Orinotherwords:ItisaframeinwhichNewton’slawshold