1. Te whakamāramatanga o te kāhua
Ko te kaha te mea e pāngia ai ngā mea whakaterengaAra, ko te kaha he mea e neke ana, e aukati ana, e whakarerekē ana rānei i te ahunga o te nekehanga o tētahi mea.
Ko te kāhua rahinga wetere Nō reira, he rahi, he ahunga hoki tō te kaha. Ko te tohu mō te kaha ko F (Taukaha). Ko F te tohu whānui mō te kaha. He maha ngā momo kaha, ā, ehara i te mea he tohu F tō ngā momo kaha katoa. Ko te waeine ā-ao mō te kaha ko kg m/s2 arā, ko Newton.
2. Te mārama ki te kaha katoa, ki te kaha hua rānei
Ko te kaha katoa, ko te kaha hua rānei, ko te tapeke o ngā kaha katoa e pā ana ki tētahi mea. He rahinga whārite te kaha, nō reira ka tatauhia te kaha katoa mā te whakamahi i te ture tāpiri whārite.
Tauira raruraru.
1.
Ko te kaha katoa = 10 Newton, ko te ahunga o te kaha katoa kei te taha matau.
2.
Ko te kaha katoa = 8 Newton, ko te ahunga o te kaha katoa kei te taha matau
3.
Te kaha katoa = 0
4.
Te kaha katoa = 0
5. Mena he ōrite ngā taumaha o ngā mea, ko te mea he nui rawa te whakaterenga ko...
Kōrero
E ai ki te Ture Tuarua o Newton , ko te rahi o te whakaterenga e pāngia ana e tētahi mea he rite ki te rahi o te kaha, ā, he rite whakamuri ki te papatipu o te mea. Ko te ahunga whakaterenga, te ahunga nekehanga rānei o tētahi mea he rite ki te ahunga o te kaha e pā ana ki te mea.
Te whakatakotoranga pāngarau o te ture tuarua a Newton: a = F / m
He rite te whakaterenga ki te kaha, nō reira ko te mea he whakaterenga nui rawa te mea e pāngia ana e te kaha hua nui rawa atu.
Ko te kāhua rahinga wetere Nō reira, ka whakatikatikaina te tāpiri o ngā kaha kia rite ki ngā ture mō te tāpiri i ngā rahinga whārite. Mena kei te rārangi tika ngā kaha, ka tāpirihia ngā kaha i te ahunga kotahi, ā, ka tangohia ngā kaha i te ahunga kē.
A –> Te kaha hua = 5 + 2 + 3 = 10 Newton (te ahunga o te kaha ki te taha matau)
B –> Te kaha hua = 3 + 5 – 2 = 6 Newton (te ahunga o te kaha ki te taha matau)
C –> Te kaha hua = 5 – 12 – 3 = -10 Newton (te ahunga o te kaha ki te taha maui)
D –> Te kaha hua = 3 – 5 – 12 = -14 Newton (te ahunga o te kaha ki te taha mauī).
Ko ngā tohu pai me ngā tohu kino e whakaahua ana i te ahunga o te kaha e puta mai ana. Te kaha hua Ko te tohu pai ko te ahunga o te kaha hua ko te taha matau (ka neke te mea ki te taha matau) ā, ko te tohu kino ko te ahunga o te kaha hua ko te taha maui (ka neke te mea ki te taha maui).
Ko te whakautu tika ko D.
6. Mena he ōrite te taumaha o ngā mea e whai ake nei, ko tēhea pikitia te mea iti rawa te whakaterenga?
Kōrero
He rite tonu te papatipu o tētahi mea, nō reira ko te whakaterenga iti rawa kei te mea e pāngia ana e te kaha hua iti rawa.
A –> Te kaha hua = 8 + 15 – 10 = 13 Newton (te ahunga o te kaha ki te taha matau)
B –> Te kaha hua = 10 + 8 – 5 = 13 Newton (te ahunga o te kaha ki te taha matau)
C –> Te kaha hua = 2 + 5 – 3 = 4 Newton (te ahunga o te kaha ki te taha matau)
D –> Te kaha hua = 8 + 4 – 5 = 7 Newton (te ahunga o te kaha ki te taha matau)
Ko te whakautu tika ko C.
7. E whā ngā mea o te papatipu kotahi e pāngia ana e ētahi kaha i te wā kotahi, e ai ki te pikitia e whai ake nei. Ko tēhea mea ka pāngia e te whakaterenga iti rawa?
Kōrero
He rite tonu te papatipu o tētahi mea, nō reira ko te whakaterenga iti rawa kei te mea e pāngia ana e te kaha hua iti rawa.
A –> Te kaha hua = 35 + 30 – 25 = 40 Newton (te ahunga o te kaha ki te taha matau)
B –> Te kaha hua = 15 + 25 – 45 = -5 Newton (te ahunga o te kaha ki te taha maui)
C –> Te kaha hua = 55 – 30 – 40 = -15 Newton (te ahunga o te kaha ki te taha maui)
D –> Te kaha hua = 50 + 10 – 40 = 20 Newton (te ahunga o te kaha ki te taha matau)
Ko te whakautu tika ko B.
8. Ko te ahunga me te hua o te kaha i roto i te ahua ki te taha ko...
A. 2 N ki Tono
B. 2 N ki Irham
C. 282 N ki Tono
D. 282 N ki Irham
Kōrero
nui te kaha hua :
ΣF = 142 N – 140 N
ΣF = 2 Newton
Ko te ahunga o te kaha hua = te ahunga o te kaha 142 Newton = ki Tono, nā te mea he nui ake te 142 Newton i te 140 Newton
Ko te whakautu tika ko A.
9. Tirohia te pikitia e whai ake nei!
Kei te tōia a Umar rāua ko Amir i ngā taha rerekē. Mena ko te kaha o Umar he 25 N, ā, ko te kaha o Amir he 20 N, ko te hua o ngā kaha e rua ko...
A. 5 Newton
B. 20 Newton
C. 25 Newton
D. 45 Newton
Kōrero
Te kaha hua = 25 N – 20 N = 5 Newton
Ko te whakautu tika ko A.
