Te whakaterenga ā-pokapū – ngā raruraru me ngā otinga

1. He pōro e piri ana ki te pito o te taura whakapae, e hurihia ana i roto i tētahi porowhita he 20 cm te whānui. E 360 te porowhita o te pōro.^o ia hēkona. Whakatauhia te rahi o te whakaterenga pokapū!

Mōhiotia:

Tere koki (ω) = 360^o/hēkona = 1 hurihanga/hēkona = 6.28 rātiana/hēkona

Pūtoro (r) = 20 henemita = 0.2 m

E hiahiatia ana: Te whakaterenga ā-pokapū (a_r)

Rongoā:

a_r = v² /r —> v = r ω

a_r = (r ω)² / r = r² ω² /r

a_r =r ω²

a_s = te whakaterenga ā-pokapū, v = te tere rārangi, r = te pūtoro, ω = tere nekehanga

Te rahi o te whakaterenga pokapū :

a_r =r ω² a_r = (0,2 m)((6.28 rāti/h)

a_r = 1.256m/s²

2. E hurihuri ana tētahi wira, he 30 cm te whānui o tōna radius, i te tere o te 180 rpm. Tātaihia te whakaterenga ā-pokapū o tētahi pūwāhi i te taha o te wira!

Mōhiotia:

Pūtoro (r) = 30 henimita = 0.3 m

Te tere koki (ω) = 180 hurihanga / 60 hēkona = 3 hurihanga / hēkona = (3)(6.28 rātiana) / hēkona = 18.84 rātiana/hēkona

E hiahiatia ana: te whakaterenga pokapū (a_r) o r = 0.3 m

Rongoā:

Te rahi o te whakaterenga pokapū:

a_r =r ω²

a_r = (0.3 mita)(18.84 rāti/s)

a_r = 5.65m/s²

3. E neke ana tētahi waka reihi i runga i tētahi ara porowhita he 50 mita te whānui. Mena he 72 km/h te tere o te waka, tautuhia te kaha o te whakaterenga ā-pokapū!

Mōhiotia:

Pūtoro (r) = 50 mita

Tere (v) = 72 km/h = (72)(1000 mita) / 3600 hēkona = 20 mita/hēkona

hiahia : te rahi o te whakaterenga ā-pokapū (a_r)

Rongoā:

a_r = v² / r = 20² / 50 = 400 / 50 = 8 m/s²

4. Ko te tere whakaterenga pūrua mōrahi o tētahi motuka he 10 m/s², kia taea ai e te motuka te huri me te kore e paheke i waho i te ara piko. Mena kei te neke te motuka i te tere pumau 108 km/h, he aha te radius o te piko kore-pareparenga?

Mōhiotia:

Te whakaterenga ā-pokapū (a_r) = 10 m/s²

Te tere o te motuka (v) = 108 kiromita/h = (108)(1000) / 3600 = 30 mitas/second

E hiahiatia ana: pūtoro (r)

Rongoā:

r = v² / he_r

r = 30² / 10 = 900 / 10 = 90 mitas

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1. Te huri i ngā waeine koki hei tauira mō ngā raruraru me ngā otinga
2. Ngā tauira raruraru me ngā otinga mō te nekehanga koki me te nekehanga rārangi
3. Ngā tauira rapanga tere koki me te tere raina me ngā otinga
4. Ngā tauira rapanga whakaterenga koki me te whakaterenga raina me ngā otinga
5. Ngā tauira rapanga nekehanga porowhita ōrite me ngā otinga
6. Ngā raruraru tauira whakaterenga pūrua me ngā otinga
7. Ngā tauira o ngā nekehanga porowhita kore-taurite me ngā otinga