7 ngā tauira o te nekehanga porowhita e huri taurite ana
1. He poroporo e okioki ana i te tīmatanga, ka huri me te whakaterenga koki pumau o te 2 rad/s.2. Tāutuhia te whakaterenga koki me te tere koki o te porotiti i muri i te 2 hēkona. Whakaaturia i roto i ngā rātiana me ngā hēkona.
Kōrero
E mōhiotia ana :
I pātaihia : te whakaterenga koki me te tere koki i muri i te 2 hēkona
11 Ngā Tauira o ngā Raru Nekehanga Porowhita Āhua
1. E neke ana tētahi matūriki i roto i tētahi porowhita me te tere koki pumau o te 10 rad/s. Whakatauhia (a) te tere koki o te matūriki i muri i te 10 hēkona (b) te koki i whakatakotoria e te matūriki i muri i te 10 hēkona.
Kōrero
(a) te tere koki i muri i te 10 hēkona
He rahinga whārite te whakatere , he rahinga ā-tinana kei a ia te rahi me te ahunga. Ko tōna tohu he ( whakatere ). Ko tōna waeine ā-ao ko ngā mita ia hekona tapawhā, he whakarāpopototanga m/s 2.
Terenga Toharite
Tauira raruraru.
He motuka e tū ana i te tīmatanga mō te 5 hēkona, kātahi ka neke ki te rawhiti me te tere o te 10 m/s. Tātaihia te whakaterenga toharite.
Kōrero
Ki te pana koe i tētahi pukapuka ki runga i tētahi tēpu kia neke rā anō, kei te mahi koe i runga i te pukapuka. Ina taka tētahi mea ki te mata o te whenua nā te mea e tōia ana e te kaha o te kaha ā-papa , ka mahi te kaha o te kaha ā-papa ki runga i te mea. I tētahi atu taha, ki te pana koe i tētahi mea ki tō kaha katoa kia mākū rawa koe i te werawera engari kāore te mea e neke, kāore koe i mahi i runga i te mea. I roto i te oranga o ia rā, e kiia ana kua mahi koe i te mahi, kua mahi uaua rānei koe i te pana i tētahi mea, engari e ai ki te ahupūngao, kāore koe i mahi i runga i te mea nā te mea kāore te mea e pāngia e te nekehanga (kāore te mea e huri i te wāhi).
Rauemi Momentum Koki
Te mea e mahi ana nekehanga tika he nekehanga tōna e taea ai te tatau mā te whakamahi i te tātai:
p = mv
Ngā Mōhiohio:
p = te nekehanga (ko te waeine ā-ao ko te kirokaramu mita / hekona, he whakarāpopototanga kg m/s)
m = papatipu (ko te waeine ā-ao ko te kirokaramu, he whakarapopototanga ki te kg)
v = tere (ko te waeine ā-ao ko te mita / hekona, he whakarāpopototanga m/s)
Ko te rahinga ā-tinana i roto i te nekehanga hurihuri e ōrite ana ki te papatipu (m) i roto i te nekehanga tika ko te wā o te korekore (I). Ko te rahinga ā-tinana i roto i te nekehanga hurihuri e ōrite ana ki te tere (v) i roto i te nekehanga tika ko tere kokiNō reira, he nekehanga tō te mea e hurihuri ana, ā, ka taea te tatau mā te whakamahi i te tātai:
Rauemi Moment of Inersia
E rua ngā mea, ko tētahi he iti te papatipu, ko tētahi he nui ake te papatipu. Ko tēhea mea he māmā ake te neke mēnā ka pēhia ki te kaha ōrite? E whakaatu ana te meka he māmā ake te neke i ngā mea he iti ake te papatipu i ngā mea he nui ake te papatipu. Nō reira, ko te rahi o te papatipu o te mea e whakatau ana i te rahi o te whakaterenga o te mea mēnā ka pāngia he kaha. Mēnā i roto i te nekehanga tika, ko te papatipu o te mea e whakatau ana mēnā he ngāwari, he uaua rānei te neke o te mea (whakateretere) i roto i te nekehanga hurihuri, ko te wā o te korekore o te mea e whakatau ana mēnā he ngāwari, he uaua rānei te neke o te mea.
Rauemi o te Mana (Taipana)
Ngā Ringa Kāhua
Whakaarohia tētahi mea e hurihuri ana, pērā i te tatau. Ina whakatuwheratia, ina kati rānei te tatau, ka hurihuri. Ko te hononga e hono ana i te tatau ki te pakitara te tuaka hurihuri.
He ahua o te tatau e kitea ana i runga. Whakaarohia tētahi tauira e panaia ana tētahi tatau e ngā kaha e rua, he rite te rahi me te ahunga o ngā kaha e rua; ko te ahunga o te kaha he poutū ki te tatau.
Kua ako kē koe i te ture tuarua a Newton, e whakaatuhia ana mā te whārite:
E whakamārama ana tēnei whārite i te whanaungatanga i waenga i te kaha hua, e mōhiotia ana ko te kaha kupenga, me te papatipu me te whakaterenga. Ko te kaha hua e pā ana ki tētahi mea he papatipu tōna ka whakatere i te mea.
I tēnei wā ka whakaatuhia e mātou tētahi atu momo o te ture tuarua a Newton, e whakamārama ana i te whanaungatanga i waenga i te kaha hua me ngā huringa o te nekehanga.
He rahinga whārite te tere , he rahinga tauine ia te tere . He rahinga me te ahunga te tere, engari he rahinga anake te tere. Ko te waeine ā-ao ko ngā mita ia hekona, he whakarāpopototanga m/s, ms -1 rānei . Ko tōna tohu ko v ( tere ).
Te tere toharite me te tere toharite
Akohia hoki ngā tauira o te tere pātata me te tere koki.
Mena ka huri te mea i te taha matau, ā, ka oti te hurihanga kotahi (360o) i roto i te 1 hēkona, ko te tere koki o ngā wāhanga katoa o te pā he 1 hurihanga/hekona = 360o / hekona = 6,28 rātiana/hekona, ā, ko te ahunga o te tere koki he taha matau. Mena he 20 cm te radius o te pā, ka neke te taha o te pā i roto i te porowhita me te tere o (2)(3,14)(20 cm) / 1 hēkona = 125,6 cm/s = 1,256 m/s. Ka neke te pūwāhi 1 cm (0,01 m) mai i te tuaka i roto i te porowhita me te tere o (2)(3,14)(1 cm) / 1 hēkona = 6,28 cm/s = 0,0628 m/s. Ko te iti o te r, ko te iti o te tere. I roto i te nekehanga porowhita , ka kiia te tere he tere tānga. Ka kiia he tānga nā te mea he tānga tonu te ahunga o te tere ki te ara porowhita.