Chifukwa mphamvu ya batri, kukana kwamkati, mphamvu yamagetsi ndi zina za parameter sizigwirizana kwathunthu, kusiyana kumeneku kumapangitsa kuti batire yomwe ili ndi mphamvu yaying'ono ikhale yowonjezereka komanso kutulutsidwa panthawi yolipiritsa, ndipo mphamvu ya batri yaying'ono kwambiri imakhala yaying'ono ikawonongeka, imalowa m'njira yoipa. Kuchita kwa batire limodzi kumakhudza mwachindunji kuchuluka kwa batire ndi kutulutsa kwa batire yonse komanso kuchepa kwa batire.
1A kufananizaTumizani batire imodzi yamphamvu kwambiri ku batri imodzi yokhala ndi mphamvu zochepa, kapena gwiritsani ntchito gulu lonse lamphamvu kuti muwonjezere batire yotsika kwambiri.Panthawi yokhazikitsa, mphamvu imagawidwanso kudzera mu ulalo wosungira mphamvu, kuti zitsimikizire kusasinthika kwa batri mpaka pamlingo waukulu, kupititsa patsogolo moyo wa batri ndikuchedwetsa kukalamba kwa batri.