17. Collisions 2x2.pdf - Collisions Page 1 of 4&ROOLVLRQV,IDV\VWHPRIREMHFWVLVGHILQHGVXFKWKDWWKHUHLV

17. Collisions 2x2.pdf - Collisions Page 1 of...

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,I±D±V\VWHP±RI±REMHFWV±LV±GHILQHG±VXFK±WKDW±WKHUH±LV± QR±QHW±H[WHUQDO±IRUFH±RQ±WKH±V\VWHP±WKHQ±ZKHQ± FROOLVLRQV±ZLWKLQ±WKH±V\VWHP±RFFXU±WKH±OLQHDU± PRPHQWXP±RI±WKH±V\VWHP±LV±FRQVHUYHG² .LQHWLF±HQHUJ\±PD\±RU±PD\±QRW±EH² ,I±WRWDO±NLQHWLF±HQHUJ\±LV±FRQVHUYHG±WKHQ±WKH± FROOLVLRQ±LV±DQ HODVWLF±FROOLVLRQ² ,I±WRWDO±NLQHWLF±HQHUJ\±LV±QRW±FRQVHUYHG±WKHQ±WKH± FROOLVLRQ±LV±DQ± LQHODVWLF±FROOLVLRQ ² ,I±WKH±REMHFWV±VWLFN±WRJHWKHU±LW±LV±D± FRPSOHWHO\± LQHODVWLF±FROOLVLRQ ² &ROOLVLRQV f i KE KE x f x i P P ± ± & & y f y i P P ± ± & & f i KE KE z Deformation requires energy Permanent deformation implies that the collision is inelastic since kinetic energy must have been lost. ([²±$±SDUWLFOH±RI±PDVV± m PRYLQJ±ZLWK±VSHHG± v FROOLGHV±KHDG±RQ± ZLWK±D±VHFRQG±SDUWLFOH±RI±HTXDO±PDVV±DW±UHVW²±±:KDW±DUH±WKH± VSHHGV±RI±WKH±WZR±SDUWLFOHV±DIWHU±WKH±FROOLVLRQ³±DVVXPLQJ±LW±LV± HODVWLF" " ´ 6 ± x ext F & x i x f P P
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