Cov coefficient of restitution (COR, kuj denoted los ntawm e), yog qhov piv ntawm qhov kawg mus rau thawj txheeb ze ceev ntawm ob yam khoom tom qab lawv sib tsoo. Nws ib txwm nyob ntawm 0 txog 1 qhov twg 1 yuav yog kev sib tsoo zoo kawg nkaus.
Tus nqi them rov qab xam li cas?
v 2−v 1=-e(u 2 −u 1). Cov qauv no yog Newton txoj cai ntawm kev them nyiaj rov qab. Tus coefficient ntawm kev them rov qab ib txwm txaus siab 0≤e≤1. Thaum e=0, cov pob tseem nyob hauv kev sib cuag tom qab kev sib tsoo.
Yuav ua li cas tus nqi them rov qab siv li cas?
Cov coefficient of restitution is a tus lej uas qhia tias lub zog kinetic ntau npaum li cas (lub zog ntawm kev txav) tseem nyob tom qab kev sib tsoo ntawm ob yam khoom … Yog hais tias kev sib tsoo zoo kawg nkaus elastic, ces lub pob yuav rebound nrog tag nrho cov ntawm lub zog nws tuaj txog thiab nws rebound ceev yuav zoo ib yam li nws txoj kev tshaj tawm.
Tus nqi nruab nrab ntawm kev them rov qab yog dab tsi?
Cov khoom siv elastic zoo kawg nkaus yuav muaj qhov sib npaug ntawm kev rov qab ntawm 1. Ib qho khoom tawm tsam cov khoom siv no yuav rov qab los nrog tib lub nrawm. Cov khoom siv zoo kawg nkaus inelastic yuav muaj qhov sib npaug ntawm 0.
Dab tsi muaj qhov sib npaug siab tshaj ntawm kev them rov qab?
Rau lub hom phiaj steel, golfball muaj tus nqi COR siab tshaj plaws ntawm txhua qhov poob siab (Daim duab 5). Qhov no ua raws li cov lus ntaus pob tesniv, hockey thiab cricket npas. Pob golf yog ib txwm ua los ntawm cov khoom sib txawv.
