Physics 121 10/18/10 Prof. E. F. Redish 1 10/18/10 1 Physics 121 10/18/10 2 Physics 121 #1 #2 #3 #4 #5 75% 45% 70% 40% 45% 10/18/10 3 Physics 121Physics 121 10/18/10 Prof. E. F. Redish 2 10/13/10 4 Physics 121 F AB= F BA a =Fnetm10/13/10 5 Physics 121 FA B where F is either N, T, f, or WT = ks (spring)fA BμABNA B WE A= mAg10/18/10 6 Physics 121 tFnetnet=Inetp I=p = mvPhysics 121 10/18/10 Prof. E. F. Redish 3 10/18/10 7 Physics 121 mAvA()= (FAext+FB A)t mBvB()= (FBext+FA B)t mAvA()+ mBvB()=FAext+FBext+FAB+FBA() t mAvA+ mBvB()=Fextt10/18/10 8 Physics 121 ()fBBfAAiBBiAABBAAvmvmvmvmvmvm+=+=+ 010/18/10 11 Physics 121 (object goes backwards) Do
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