Fomura yeMutemo yaNewton

Mienzaniso yemibvunzo nemafomura emitemo yaNewton

Mutemo wekutanga waNewton

1. Munhu ari muelevator iri kufamba ichikwira nekumhanya kwakasimba. Munhu wacho anorema 800 N. Tambo yesimbi inodhonza elevator inotyoka, zvichiita kuti elevator iwire pasi. Simba rakajairika kubva pasi remurevheta kuenda kumunhu nguva pfupi tambo yesimbi isati yatyoka uye mushure mekunge….

1. 800 N uye 0
2. 800 N uye 800 N
3. 1600 N uye 0
4. 1600 N uye 800 N

Kukurukurirana
Zvinozivikanwa kuti:
Kurema (w) = 800 Newtons
Mubvunzo: Simba rakajairika (N) rinoshanda pamunhu nguva pfupi tambo yesimbi isati yatyoka uye mushure mekunge yatyoka
Mhinduro:
Nguva pfupi tambo yesimbi isati yadambuka
Kana munhu akamira pasi pechikwidzi, simba rekukwevera pasi rinoshanda pamunhu uye gwara resimba rinoenda pasi (tarisa mufananidzo uri pazasi). Munhu wacho akamira muchikwidzi saka panofanira kunge paine simba rakajairika rinoenzanisa huremu hwemunhu, uko simba iri rine gwara rekuenda kumusoro uye rakaenzana nehukuru hwesimba rekukwevera pasi. Simba rakajairika rinoitwa pasi pamunhu uye simba iri rinoshanda pamunhu.
Nekuti munhu wacho akamira muelevator uye elevator iri kufamba nekumhanya kwakasimba (hapana kumhanyisa), simba rinobuda pamunhu wacho harisi zero.
∑F = 0
N – w = 0
N = w
N = 800 Newton

Mushure mekunge tambo yesimbi yadambuka
Kana tambo yesimbi yatyoka, elevator nemunhu zvinowira pamwe chete zvakasununguka, uko hukuru negwara rekukwira kwe free fall kweelevator nemunhu zvakaenzana nekukwira kwesimba rinokwevera pasi. Elevator nemunhu zvinowira pamwe chete zvakasununguka zvekuti hapana simba rakajairika rinoitwa neelevator pasi pamunhu. Munhu ari kudonha uye tsoka dzemunhu hadzigone kudzvanya pasi elevator nekuti elevator iri kudonhawo.
Mhinduro chaiyo ndiA.

2. Masimba matatu, rimwe nerimwe rine hukuru hweF₁ = 22 N, F₂ = 18 N uye F₃ = 40 N inoiswa pabhuroko rehuni. Masimba anoshanda pabhuroko, anotevedzera mutemo wekutanga waNewton, anoratidzwa mumufananidzo...

Kukurukurirana

Mutemo wekutanga waNewton: Simba rinobuda (ΣF) = 0.

A. F₁ +F₂ - F₃ = 22 N + 18 N – 40 N = 40 N – 40 N = 0

B. F₂ +F₃ - F₁ = 18 N + 40 N – 22 N = 58 N – 22 N = 36 N (kurudyi)

C. F₂ +F₃ - F₁ = 18 N + 40 N – 22 N = 58 N – 22 N = 36 N (kurudyi)

D. F₁ +F₃ - F₂ = 22 N + 40 N – 18 N = 62 N – 18 N = 44 N (kuruboshwe)

Mhinduro chaiyo ndiA.

Mutemo Wechipiri waNewton

3.
Tarisa mufananidzo!
Bhokisi re40 kg rinodhonzwa nesimba re200 N, zvichiita kuti rimhanye ne3 m/s² Saka hukuru hwesimba rekukweshana rinoitika pachinhu/pachivharo ndi...

1. 15 N
2. 40 N
3. 43 N
4. 80 N

Kukurukurirana
Zvinozivikanwa kuti:
Huremu (m) = 40 kg
Simba (F) = 200 N
Kukurumidzisa (a) = 3 m/s²
Mubvunzo: Hukuru hwesimba rekukakavadzana (F)_g)
Mhinduro:
Fomura yechipiri yemutemo waNewton:
∑F = ma
Tsananguro: ∑F = simba rinobuda, m = uremu, a = kukurumidza

Kutungamira kwesimba F kuri kurudyi ukuwo kumberi kwekukweshana kuri kuruboshwe (kumberi kwekukweshana kwakatarisana nekutungamira kwechinhu). Kutungamira kurudyi kunosarudzwa sekwakanaka uye kutungamira kuruboshwe kunosarudzwa sekwakaipa.
∑F = ma
F – F_g = amai
200 - F_g = (40)(3)
200 - F_g = 120
F_g = 200 - 120
F_g = 80 Newton
Mhinduro chaiyo ndiD.

4. Bhokisi A rine huremu hwemagiramu zana rinoiswa pamusoro pebhokisi B rine huremu hwemagiramu mazana matatu, uye bhokisi B rinosundidzirwa nesimba re5 N rakamira kumusoro. Kana bhokisi rikasafamba-famba, saka hukuru hwesimba rakajairika nebhokisi B pabhokisi A nde….

1. 1 N
2. 1,25 N
3. 2 N
4. 3 N

Kukurukurirana
Zvinozivikanwa kuti:
Simba rekusundira (F) = 5 Newton
Huremu hwebhuroko A (m)_A) = magiramu mazana mashanu = 0,1 kg
Huremu hwebhuroko B (m_B) = magiramu mazana mashanu = 0,3 kg
Kukurumidza kunokonzerwa negiravhiti (g) = 10 m/s²
Kurema kwebhuroko A (w)_A) = (0,1 kg)(10 m/s²) = 1 kg m/s² = 1 Newton
Kurema kwebhuroko B (w)_B) = (0,3 kg)(10 m/s²) = 3 kg m/s² = 3 Newton

Mubvunzo: Simba rakajairika nebhuroko B pabhuroko A
Mhinduro:
Kune masimba akati wandei anoshanda pamabhuroko ese ari maviri, sezvakaratidzwa mumufananidzo uri pazasi.
F = simba rekusundidzira (rinoshanda pabhokisi B)
w_A = simba rekukwevera pasi rebhokisi A (rinoshanda pabhokisi A)
w_B = huremu hwebhokisi B (rinoshanda pabhokisi B)
N_A = simba rakajairika nebhokisi B pabhokisi A (rinoshanda pabhokisi A)
N_A' = simba rakajairika nebhokisi A pabhokisi B (rinoshanda pabhokisi B)

Funga nezvemabhuroko ese ari maviri sehurongwa humwe chete:
Shandisa mutemo wechipiri waNewton kumabhuroko ese ari maviri:
∑F = ma
F – w_A - w_B +N_A - N_A' = (m_A +m_B) a
N_A uye N_A' isimba rekuita-kuita rine hukuru hwakafanana asi rakapesana saka rinobviswa muequation.
F – w_A - w_B = (m_A +m_B) a
5 – 1 – 3 = (0,1 + 0,3) a
5 – 4 = (0,4) a
1 = (0,4) a
a = 1 / 0,4
a = 2,5 m/s²
Kuvapo kwesimba (F) remaNewton mashanu richishanda rakamira kumusoro pamabharuko ese ari maviri kunoita kuti mabhiruko ese afambe akamira kumusoro nekumhanya kwe2,5 m/s.².

Funga nezvebhokisi A:
Shandisa mutemo wechipiri waNewton kudzivirira A:
∑F = ma
N_A - w_A = m_A a
N_A – 1 = (0,1)(2,5)
N_A - 1 = 0,25
N_A = 1 + 0,25
N_A = 1,25 Newton
Simba rakajairika nebhuroko B pabhuroko A i1,25 Newton.
Mhinduro chaiyo ndeiyi B.

Mutemo wechitatu waNewton

5. Teererai chirevo chinotevera!

(1) Vafambi vakasundidzirwa mberi apo bhazi, iro raifamba zvishoma nezvishoma, rakangoerekana rabhureki zvine simba.

(2) Murwi wemabhuku ari pamusoro pekadhibhodhi hauzodonhe kana kadhibhodhi rikadhonzwa nekukurumidza.

(3) Pakutamba skateboard, kana tsoka yakasununguka ikasundira pasi kumashure, skateboard inotsvedza ichienda mberi.

(4) Chikepe chinosundirwa kumashure, chikepe chinoenderera mberi.

Chirevo chiri pamusoro apa chinoenderana nemutemo wechitatu waNewton ndechekuti...

A. (1) na (2)

B. (1) uye (3)

C. (2) uye (3)

D. (3) na (4)

Kukurukurirana

(1) Mutemo wekutanga waNewton

(2) Mutemo wekutanga waNewton

(3) Mutemo wechitatu waNewton

(4) Mutemo wechitatu waNewton

Mhinduro chaiyo ndiD.

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