I runga tukinga ā-wāhanga (tukinga rapa kore tino tika) ka pā te ture tiaki o te nekehanga engari kāore te ture tiaki i te pūngao nekeneke e pā. I te wā o te tukinga, ko ētahi o ngā pūngao nekeneke kua hurihia hei pūngao oro, hei pūngao wera, hei pūngao ā-roto. Ko te whakamahinga o te kupu elastic e tohu ana i muri i te tukinga, kāore ngā mea e rua e hanumi hei mea kotahi, e piri rānei, engari ka pekepeke. Ko tētahi tauira o te tukinga elastic kāore i tino tika ko te tukinga kotahi-ahu i waenganui i ngā māpere e rua, i ngā pōro piriata e rua rānei.
Tauira raruraru.
1. Ko ngā taonga A me B, he 1 kg me te 2 kg te taumaha o ia taonga, ka neke i ngā taha rerekē i ngā tere o te 4 m/s me te 2 m/s, ā, ka tukinga i roto i te āhua tino ngāwari. Mena i muri i te tukinga, ka neke te taonga A i te tere o te 2 m/s, he aha te tere o te taonga B?
Kōrero
E mōhiotia ana :
mA = 1 kg, mitaB = 2 kg, vA = 4 m/s (hei tauira, ki te taha matau), vB = -2 m/s (hei tauira, ki te taha maui), vA' = -2 m/s
I pātaihia i roto iB'
Whakautu :
I muri i te tukinga, ka neke te mea B i te tere o te 1 m/s (hei tauira, ki te taha matau) ā, ka neke te mea A i te tere o te 2 m/s (hei tauira, ki te taha maui).
