Chitsanzo cha mafunso a Elasticity

Zitsanzo 21 za Mafunso Okhazikika

Kuwonjezeka kwa Utali

1. Ndodo yofanana ya kutalika kwa L, ikakokedwa ndi mphamvu F, imawonjezeka kutalika ndi ∆L.

Kotero kuti kutalika kwa kutalika kumakhala 4 ΔL, kukula kwa mphamvu yokoka ndi...

A. 1/4 F

B. 1/2 F

C. 2 F

D. 4 F

E. 16 F

Zokambirana

Amadziwika kuti:

Mphamvu yokoka 1 (F ₁ ) = F

Kuwonjezeka kwa kutalika 1 (∆L ₁ ) = ∆L

Kuwonjezeka kwa kutalika 2 (∆L ₂ ) = 4 ∆L

Funso: Mphamvu yokoka 2 (F ₂ )

Yankho:

Fomula ya lamulo la Hooke:

k = F / ΔL

Kufotokozera: k = chosasinthika chotanuka, F = mphamvu yokoka, ΔL = kutalika kowonjezeka

Ndodo zomwe zimagwiritsidwa ntchito ndi zofanana kotero kuti chokhazikika chokhazikika (k) chikhale chimodzimodzi.

k ₁ = k ₂

F ₁ / ∆L ₁ = F ₂ / ∆L ₂

F / ΔL = F ₂ / 4ΔL

F / 1 = F ₂ / 4

F = F _2/4

F ₂ = 4F

Yankho lolondola ndi D.

2. Masipule atatu ofanana, aliwonse okhala ndi mphamvu ya kasupe ya 200 N/m, akonzedwa monga momwe zasonyezedwera pachithunzichi. Akapatsidwa katundu wa magalamu 100 (kuthamanga kwa mphamvu yokoka g = 10 m/s), kutalika kwa kusonkhana kwa kasupe kumawonjezeka...

A. x = 0,50 cm

B. x = 0,75 cm

C. x = 0,85 cm

D. x = 1,00 cm

E. x = 1,50 cm

Zokambirana

Amadziwika kuti :

Kulemera kwa katundu (m) = magalamu 100 = 0,1 kg

k ₁ = k ₂ = k ₃ = 200 N/m

w = mg = (0,1 kg)(10 m/s ² ) = 1 kg m/s ² = 1 Newton

Anafunsa : Kuwonjezeka kwa kutalika kwa masika onse ?

Yankho :

Kudziwa chokhazikika cha kasupe cholowa m'malo

Kasupe 2 (k₂) ndi kasupe 3 (k₃) yokonzedwa motsatizana. Chofanana ndi masika ndi:

k _p = k ₂ + k ₃ = 200 + 200 = 400 Nm ⁻¹

Kasupe 1 (k ₁ ) ndi kasupe wolowa m'malo wofanana (k _P ) zakonzedwa motsatizana. Chokhazikika cha kasupe wolowa m'malo ndi:

1/k _s = 1/k _p + 1/k ₁ = 1/400 + 1/200 = 1/400 + 2/400 = 3/400

k _s = 400/3 Nm ⁻¹

Chofanana ndi chokhazikika cha kasupe cha dongosolo la kasupe wofanana ndi mndandanda ndi 400/3 Nm ^-1

Kudziwa kuchuluka kwa kutalika kwa masika

Fomula ya lamulo la Hooke:

= F / k = w / k

Kuwonjezeka kwa kutalika kwa masika ndi:

= w / k

= 1 : 400/3 = 1 x 3/400 = 3/400 = 0,0075 mamita = 0,75 cm

Yankho lolondola ndi B.

Nthawi Yokhazikika ya Masika

3. Mu kuyesa kokhudza kusinthasintha kwa kasupe, deta idapezeka monga momwe zasonyezedwera mu tebulo ili m'munsimu. Titha kunena kuti mtengo wa kasupe wokhazikika ndi….

A. 1.002 N/m

B. 1.201 N/m

C. 1.225 N/m

D. 1.245 N/m

E. 1.250 N/m

Zokambirana

Fomula ya lamulo la Hooke:

k = F / Δx

Chokhazikika cha masika:

k = 0,98/0,0008 = 1,96/0,0016 = 2,94/0,0024 = 3,92/0,0032 = 1.225 N/m

Yankho lolondola ndi C.

4. Masipu a katatu akonzedwa monga momwe zasonyezedwera pachithunzi chotsatirachi. Ngati masika okhazikika k ₁ = k ₂ = 3 Nm ⁻¹ ndi k ³ = 6 Nm ⁻¹ , nthawi yokhazikika ya masipu ndi…..

A. 1 Nm^-1

B. 3 Nm ⁻¹

C. 7,5 Nm ⁻¹

D. 12 Nm ⁻¹

E. 15 Nm ⁻¹

Zokambirana

Amadziwika kuti:

Chisamaliro cha masika 1 (k ₁ ) = chisamaliro cha masika 2 (k ₂ ) = 3 Nm ⁻¹

Chigawo cha masika 3 (k ₃ ) = 6 Nm ⁻¹

Yafunsidwa: nthawi yokhazikika ya masika (k)

Yankho:

Kasupe 1 (k ₁ ) ndi kasupe 2 (k ₂ ) zakonzedwa motsatizana. Chofanana ndi chokhazikika cha kasupe ndi:

k _p = k ₁ + k ₂ = 3 + 3 = 6 Nm ⁻¹

Kasupe wolowa m'malo wofanana (k _P ) ndi kasupe 3 (k ₃ ) amakonzedwa motsatizana. Chokhazikika cha kasupe wolowa m'malo ndi:

1/k _s = 1/k _p + 1/k ₃ = 1/6 + 1/3 = 1/6 + 2/6 = 3/6

k ₌ 6/2 = 3 Nm ⁻¹

Chofanana ndi chokhazikika cha kasupe cha dongosolo la kasupe wofanana ndi mndandanda pamwambapa ndi 3 Nm ⁻¹

Yankho lolondola ndi B.

5. Kasupe wokhala ndi kutalika kwa L amakokedwa ndi katundu w motsatizana ndipo deta yomwe yapezeka ndi monga momwe zilili patebulo lotsatira. Kutengera deta ya tebulo, zitha kutsimikizika kuti kukula kwa kasupe wokhazikika ndi….

A. 300 Nm^-1

B. 500 Nm ^-1

C. 600 Nm ^-1

D. 800 Nm ^-1

E. 1000 Nm ^-1

Zokambirana

Fomula ya lamulo la Hooke:

k = F /

Chokhazikika cha masika:

k = 10/0,02 = 20/0,04 = 30/0,06 = 40/0,08 = 500 Nm ^-1

Yankho lolondola ndi B.

6. Deta yomwe ili mu tebulo loyesera lotsatira ndi zotsatira za kuyesera kokhudzana ndi kusinthasintha kwa zinthu. Mu kuyesera, zinthu za rabara zomwe zinagwiritsidwa ntchito zinali chubu chamkati cha njinga yamoto. (g = 10 m/s ² ). Kutengera tebulo pamwambapa, zitha kutsimikizika kuti zinthu za rabara zili ndi chokhazikika cha….

A. 122 N/m

B. 96 N/m

C. 69 N/m

D. 56 N/m

E. 40 N/m

Zokambirana

Fomula ya lamulo la Hooke :

k = F / = w / = mg /

Kufotokozera: k = kusinthasintha kosalekeza, w = mphamvu yokoka, m = kulemera, g = kuthamanga chifukwa cha mphamvu yokoka, = kutalika kwa rabala

Chokhazikika cha masika:

k = 2/0,05 = 4/0,1 = 6/0,15 = 8/0,20 = 10/0,25 = 40 N/m

Yankho lolondola ndi E.

7. Masipu a katatu akonzedwa monga momwe zasonyezedwera pachithunzi chotsatirachi. Ngati sing'anga yokhazikika K1 ₌ 4K, ndiye kuti mtengo wa sing'anga yokhazikika ndi ….

A. 3/4K

B. 3K/4

C. 4K/3

D. 3K

E. 4K

Zokambirana

Masipu awiri okonzedwa motsatizana. Chilinganizo chofanana cha masipu awiri okonzedwa motsatizana ndi ichi:

k _p = K + K = 2K

Masipu awiri amakonzedwa motsatizana. Chilinganizo chofanana cha masipu awiri okonzedwa motsatizana ndi ichi:

1/k _s = 1/k _p + 1/K ₁ = 1/2K + 1/4K = 2/4K + 1/4K = 3/4K

k ₌ 4K/3

Chofanana ndi chokhazikika cha kasupe cha dongosolo la kasupe pamwambapa ndi 4K/3

Yankho lolondola ndi C.

8. Lamba la rabara lokhala ndi kutalika kwa L limapachikidwa ndi katundu m'njira yoti deta yomwe yapezeka ikhale ngati yomwe ili patebulo. Kutengera tebulo, zitha kutsimikizika kuti kukula kwa chokhazikika cha kasupe ndi….

A. 250 Nm^—1

B. 360 Nm ^—1

C. 400 Nm ^—1

D. 450 Nm ^—1

E. 480 Nm ^—1

Zokambirana

Fomula ya lamulo la Hooke:

k = F /

Chokhazikika cha masika:

k = 2/0,0050 = 3/0,0075 = 4/0,01 = 400 Nm ^-1

Yankho lolondola ndi C.

9. Yang'anirani deta yoyesera ya mitundu isanu ya matayala a rabara A, B, C, D, ndi E omwe amakokedwa ndi mphamvu F kuti kutalika kwawo kukwere. Tayala la rabara lomwe lili ndi kasupe kakang'ono kwambiri ndi…

Zokambirana

Fomula ya lamulo la Hooke:

k = F / Δx

Kufotokozera: k = chosasinthika chotanuka, F = mphamvu, Δx = kuwonjezeka kwa kutalika kwa rabara

Mphira wosasinthasintha:

k _A = F / Δx = 1 / 0,05 = 20 N/m

k _B = F / Δx = 2 / 0,025 = 80 N/m

k _C = F / Δx = 1 / 0,025 = 40 N/m

k _D = F / Δx = 2 / 0,05 = 40 N/m

k _E = F / Δx = 2 / 0,25 = 8 N/m

Yankho lolondola ndi E.

10. Kuchokera ku kuyesera kuti mudziwe kulimba kwa rabara pogwiritsa ntchito rabara ya tayala, deta yomwe yapezeka ndi monga momwe zilili patebulo lotsatira. Titha kunena kuti mtengo wokhazikika kwambiri ndi kuyesera….

Zokambirana

Fomula ya lamulo la Hooke:

k = F / Δx

Chokhazikika cha masika:

k _A = 7/0,035 = 200 Nm ^-1

k _B = 8/0,025 = 320 Nm ^-1

k _C = 6/0,020 = 300 Nm ^-1

k _D = 9/0,045 = 200 Nm ^-1

k _E = 10/0,033 = 303 Nm ^-1

Chokhazikika chachikulu kwambiri cha elastic ndi 320 Nm ^-1.

Yankho lolondola ndi B.

11. Chithunzi chomwe chili pansipa chikuwonetsa ubale pakati pa kusintha kwa katundu (ΔF) ndi kuwonjezeka kwa kutalika (ΔX), graph yomwe ikuwonetsa mtengo wocheperako wa chokhazikika chotanuka...

Zokambirana

Fomula ya lamulo la Hooke

k = F / Δx

Zambiri:

Δx = kuwonjezeka kwa kutalika, F = mphamvu, k = chosasintha chotanuka

Kukhazikika kosalekeza

k _A = F / Δx = 1 / 8 = 0,125

k _B = F / Δx = 8 / 3 = 2,7

k _C = F / Δx = 6 / 6 = 1

k _D = F / Δx = 3 / 5 = 0,6

k _E = F / Δx = 2 / 4 = 0,5

Yankho lolondola ndi A.

12. Yang'anani graph ya ubale pakati pa mphamvu (F) ndi kutalika kwa kutalika (ΔX) pansipa! Ndi iti yomwe ili ndi chokhazikika chachikulu kwambiri chokhazikika?

Zokambirana

Kukhazikika kosalekeza

k _A = F / Δx = 50 / 10 = 5

k _B = F / Δx = 50 / 0,1 = 500

k _C = F / Δx = 5 / 0,1 = 50

k _D = F / Δx = 500 / 0,1 = 5000

k _E = F / Δx = 500 / 10 = 50

Yankho lolondola ndi D.

Mphamvu Yotheka ya Masika

13. Chithunzi (Fx) chikuwonetsa ubale pakati pa mphamvu ndi kutalika kwa kasupe. Kukula kwa mphamvu ya kasupe kutengera chithunzi pamwambapa ndi...

A. majoule 20

B. 16 majoule

C. 3,2 majoule

D. 1,6 majoule

E. 1,2 majoule

Zokambirana

Amadziwika kuti:

F = 40N

x = mamita 0,08

Funso: Mphamvu yomwe ingakhalepo ya masika

Yankho:

Chokhazikika cha masika:

k = F / Δx = 40/0,08 = 500 N/m

Mphamvu yomwe ingakhalepo ya masika:

EP = 1/2 kx ² = 1/2 (500)(0,08) = (250)(0,08) = 20 Joules

Yankho lolondola ndi A.

14. Kasupe amapatsidwa katundu wa makilogalamu awiri monga momwe chithunzichi chikusonyezera. Ngati kasupeyo awona kutalika kwa 5 cm ndipo kuthamanga chifukwa cha mphamvu yokoka ndi 10 ms ^-2 , ndiye kuti mphamvu yolimba ya kasupeyo ndi...

A. 4,0 J

B. 3,0 J

C. 2,5 J

D. 1,0 J

E. 0,5 J

Amadziwika kuti :

Kuwonjezeka kwa kutalika (Δx) = 5 cm = 0,05 mamita

Kuthamanga chifukwa cha mphamvu yokoka (g) = 10 m/s ²

Kulemera kwa katundu (m) = 2 kg

Kulemera kwa katundu (w) = mg = (2)(10) = 20 Newton

Funso : Mphamvu yomwe ingakhalepo ya rabara?

Amadziwika kuti :

Kuwonjezeka kwa kutalika (Δx) = 5 cm = 0,05 mamita

Kuthamanga chifukwa cha mphamvu yokoka (g) = 10 m/s ²

Kulemera kwa katundu (m) = 2 kg

Kulemera kwa katundu (w) = mg = (2)(10) = 20 Newton

Funso : Mphamvu yomwe ingakhalepo ya rabara?

15. Kuti kasupe atambasule masentimita 5, mphamvu ya 20 N imafunika. Mphamvu yomwe kasupe angayitambasule masentimita 10 ndi…

A. 2 Joule

B. 4 Joule

C. 20 Joule

D. 50 Joule

E. 100 Joule

Zokambirana

Amadziwika kuti :

Kuwonjezeka kwa kutalika (Δx) = 5 cm = 0,05 mamita

Mphamvu (F) = 20 Newtons

Funso : Kodi EP ya kasupe ndi chiyani pamene kasupe imatambasula 10 cm?

Yankho :

Chokhazikika cha masika:

k = F / Δx = 20 / 0,05 = 400 N/m

Mphamvu yomwe ingakhalepo ya masika pamene Δx = 10 cm = 0,1 metres:

EP = ½ k Δx ² = ½ (400)(0,1) ² = (200)(0,01)

EP = 2 Joule

Yankho lolondola ndi A.

Kulemera kwa Katundu

16. 

A. 6 N

B. 12 N

C. 30 N

D. 45 N

E. 60 N

Masipuleti anayi ofanana, aliwonse okhala ndi chokhazikika chotanuka cha 800 Nm ⁻¹ , amakonzedwa motsatizana komanso motsatizana (onani chithunzi). Katundu wopachikidwa w amachititsa kuti dongosolo la masipuleti liwonjezere kutalika kwa 5 cm. Kulemera kwa katundu w ndi…

Zokambirana

Amadziwika kuti :

k ₁ = k ₂ = k ₃ = k ₄ = 800 N m ⁻¹

= 5 cm = 0,05 m

Anafunsa : kulemera kwa katundu (w)?

Yankho :

Kudziwa chokhazikika cha kasupe cholowa m'malo

Kasupe 1 (k₁), kasupe 2 (k₂) ndi kasupe 3 (k₃) yokonzedwa motsatizana. Chofanana ndi masika ndi:

k _p = k ₁ + k ₂ + k ₃ = 800 + 800 + 800 = 2400 Nm ⁻¹

Kasupe wolowa m'malo wofanana (k _P ) ndi akasupe anayi (k ₄ ) amakonzedwa motsatizana. Chokhazikika cha kasupe wolowa m'malo ndi:

1/k _s = 1/k _p + 1/k ₄ = 1/2400 + 1/800 = 1/2400 + 3/2400 = 4/2400

k ₌ 2400/4 = 600 Nm ⁻¹

Chofanana ndi chokhazikika cha kasupe cha dongosolo la kasupe wofanana ndi mndandanda pamwambapa ndi 600 Nm ^-1

Kudziwa kulemera kwa katundu

Fomula ya lamulo la Hooke:

F=k kapena w = k

Kulemera kwa katundu ndi:

w = (600 Nm ^-1 )(0,05 m) = 30 Newtons

Kulemera kwa katundu ndi 30 Newtons.

Yankho lolondola ndi C.

17. Masipulogalamu anayi ofanana, aliwonse okhala ndi chokhazikika chotanuka cha 1600 N/m, amakonzedwa motsatizana komanso motsatizana (onani chithunzi). Katundu wopachikidwa w amachititsa kuti dongosolo la masipulogalamu liwonjezere kutalika kwa 5 cm. Kulemera kwa katundu w ndi….

A. 60 N

B. 120 N

C. 300 N

D. 450 N

E. 600 N

Zokambirana

Amadziwika kuti :

k ₁ = k ₂ = k ₃ = k ₄ = 1600 N m ⁻¹

= 5 cm = 0,05 m

Anafunsa : kulemera kwa katundu (w)?

Yankho :

Kudziwa chokhazikika cha kasupe cholowa m'malo

Kasupe 1 (k ₁ ), kasupe 2 (k ₂ ) ndi kasupe 3 (k ₃ ) zakonzedwa motsatizana. Chofanana ndi chokhazikika cha kasupe ndi:

k _P = k ₁ + k ₂ + k ₃ = 1600 + 1600 + 1600 = 4800 Nm ⁻¹

Kasupe wolowa m'malo wofanana (k _P ) ndi akasupe anayi (k ₄ ) amakonzedwa motsatizana. Chokhazikika cha kasupe wolowa m'malo ndi:

1/k _s = 1/k _p + 1/k ₄ = 1/4800 + 1/1600 = 1/4800 + 3/4800 = 4/4800

k ₌ 4800/4 = 1200 Nm ⁻¹

Chofanana ndi chokhazikika cha kasupe cha dongosolo la kasupe wofanana ndi mndandanda ndi 1200 Nm ^-1

Kudziwa kulemera kwa katundu

Fomula ya lamulo la Hooke:

F=k kapena w = k

Kulemera kwa katundu ndi:

w = (1200 Nm ^-1 )(0,05 m) = 60 Newtons

Kulemera kwa katundu ndi 60 Newtons.

Yankho lolondola ndi A.

Zotanuka ndi Pulasitiki

18. Onani graph ya ubale pakati pa mphamvu ΔF ndi kuwonjezeka kwa kutalika Δx pa kasupe pansipa!

Kutengera ndi graph, kasupe adzakhalabe wotanuka pa mphamvu yokoka ya….

A. 0 mpaka 4 N

B. 0 mpaka 8 N

C. 0 mpaka 12 N

D. 8 N mpaka 12 N

E. 8 N mpaka 16 N

Zokambirana

Kasupe amakhalabe wotambasuka ngati lamulo la Hooke likugwirabe ntchito. Mwa masamu, lamulo la Hooke limafotokozedwa ndi njira iyi:

k = ΔF / Δx

Kufotokozera kwa fomula:

k = chosasinthika chotanuka, ΔF = mphamvu, Δx = kutalika kwa kasupe

Lamulo la Hooke limati chiŵerengero cha kusintha kwa mphamvu (ΔF) ku kusintha kwa kutalika (Δx) kwa kasupe nthawi zonse chimakhala chokhazikika. Ngati mtengo wa k usintha, lamulo la Hooke siligwiranso ntchito ku kasupe ndipo izi zikusonyeza kuti kasupeyo salinso wotanuka.

Yang'anani graph yomwe ili pamwambapa ndikumvetsetsa mawerengedwe otsatirawa.

k ₁ = ΔF / Δx = 4 / 2 = 2

k ₂ = ΔF / Δx = 8 / 4 = 2

k ₃ = ΔF / Δx = 12 / 7 = 1,7

Kasupe wosasintha (k) ndi wokhazikika mpaka mphamvu yokoka ya ma Newton 8. Chifukwa chake, kasupeyo adzakhalabe wotanuka pa mphamvu yokoka ya ma Newton 0 mpaka 8.

Yankho lolondola ndi B.

19. Chithunzi chotsatirachi chikuwonetsa ubale pakati pa kuwonjezeka kwa kutalika kwa Δx ndi mphamvu ΔF ya rabala yomwe imakokedwa ndi mphamvu. Kutengera ndi graph, rabala idzasintha mawonekedwe ake apulasitiki mphamvu ikagwira ntchito pa rabala...

A. 0 mpaka 2 N

B. 0 mpaka 4 N

C. 2 N mpaka 6 N

D. 4 N mpaka 8 N

E. 6 N mpaka 8 N

Zokambirana

Rabala lidzakhalabe lolimba bola ngati cholimba cholimba chikhalabe cholimba. Ngati cholimba cholimba chiyamba kusintha, rabala limayamba kusintha kuchoka pa cholimba kukhala pulasitiki. Kutanuka kumatanthauza kuti mphamvu yokoka ikachotsedwa, rabala limabweranso momwe linalili poyamba. Mosiyana ndi zimenezi, pulasitiki imatanthauza kuti mphamvu yokoka ikachotsedwa, rabala silibwerera momwe linalili poyamba.

Yang'anani graph yomwe ili pamwambapa ndikumvetsetsa mawerengedwe otsatirawa:

k ₁ = ΔF / Δx = 2 / 2 = 1

k ₂ = ΔF / Δx = 4 / 4 = 1

k ₃ = ΔF / Δx = 6 / 6 = 1

k ₄ = ΔF / Δx = 7 / 8 = 0,87

k ₄ = ΔF / Δx = 8 / 12 = 0,6

Rabala idzasintha pulasitiki yake ikagwiritsidwa ntchito mphamvu ya ma Newton 6 mpaka 8. Ngati mphamvuyo ndi yoposa ma Newton 8, rabalayo idzasweka.

20. Onani graph ya ubale pakati pa mphamvu ΔF ndi kuwonjezeka kwa kutalika Δx pa kasupe pansipa!
Kutengera ndi graph, kasupe adzakhalabe wotanuka pa mphamvu yokoka ya….

A. 0 mpaka 4 N
B. 0 mpaka 8 N
C. 0 mpaka 12 N
D. 8 N mpaka 12 N
E. 8 N mpaka 16 N

Zokambirana
Kasupe amakhalabe wotambasuka ngati lamulo la Hooke likugwirabe ntchito. Mwa masamu, lamulo la Hooke limafotokozedwa ndi njira iyi:
k = ΔF / Δx
Kufotokozera kwa fomula:
k = chosasinthika chotanuka, ΔF = mphamvu, Δx = kutalika kwa kasupe

Lamulo la Hooke limati chiŵerengero cha kusintha kwa mphamvu (ΔF) ku kusintha kwa kutalika (Δx) kwa kasupe nthawi zonse chimakhala chokhazikika. Ngati mtengo wa k usintha, lamulo la Hooke siligwiranso ntchito ku kasupe ndipo izi zikusonyeza kuti kasupeyo salinso wotanuka.

Yang'anani graph yomwe ili pamwambapa ndikumvetsetsa mawerengedwe otsatirawa.
k₁ = ΔF / Δx = 4 / 2 = 2
k₂ = ΔF / Δx = 8 / 4 = 2
k₃ = ΔF / Δx = 12 / 7 = 1,7

Kasupe wosasintha (k) ndi wokhazikika mpaka mphamvu yokoka ya ma Newton 8. Chifukwa chake, kasupeyo adzakhalabe wotanuka pa mphamvu yokoka ya ma Newton 0 mpaka 8.
Yankho lolondola ndi B.

21. Chithunzi chotsatirachi chikuwonetsa ubale pakati pa kuwonjezeka kwa kutalika kwa Δx ndi mphamvu ΔF ya gulu la rabara lomwe limakokedwa ndi mphamvu. Kutengera ndi graph, rabala idzasintha mawonekedwe ake apulasitiki mphamvu ikagwira ntchito pa iyo...

A. 0 mpaka 2 N
B. 0 mpaka 4 N
C. 2 N mpaka 6 N
D. 4 N mpaka 8 N
E. 6 N mpaka 8 N

Zokambirana
Rabala lidzakhalabe lolimba bola ngati cholimba cholimba chikhalabe cholimba. Ngati cholimba cholimba chiyamba kusintha, rabala limayamba kusintha kuchoka pa cholimba kukhala pulasitiki. Kutanuka kumatanthauza kuti mphamvu yokoka ikachotsedwa, rabala limabweranso momwe linalili poyamba. Mosiyana ndi zimenezi, pulasitiki imatanthauza kuti mphamvu yokoka ikachotsedwa, rabala silibwerera momwe linalili poyamba.

Yang'anani graph yomwe ili pamwambapa ndikumvetsetsa mawerengedwe otsatirawa:
k₁ = ΔF / Δx = 2 / 2 = 1
k₂ = ΔF / Δx = 4 / 4 = 1
k₃ = ΔF / Δx = 6 / 6 = 1
k₄ = ΔF / Δx = 7 / 8 = 0,87
k₅ = ΔF / Δx = 8 / 12 = 0,6

Rabala idzasintha pulasitiki yake ikagwiritsidwa ntchito mphamvu ya ma Newton 6 mpaka 8. Ngati mphamvuyo ndi yoposa ma Newton 8, rabalayo idzasweka.

Yankho lolondola ndi E.

Kukhazikika kosalekeza

22. Yang'anirani deta yoyesera ya mitundu isanu ya matayala a rabara A, B, C, D ndi E omwe amakokedwa ndi mphamvu F kuti kutalika kwawo kukwere. Tayala la rabara lomwe lili ndi kasupe kakang'ono kwambiri ndi…
Zokambirana

Fomula ya lamulo la Hooke :
k = F / Δx
Kufotokozera: k = kusinthasintha kosalekeza, F = gaya, Δx = kuwonjezeka kwa kutalika kwa rabara
Mphira wosasinthasintha:
k_A = F / Δx = 1 / 0,05 = 20 N/m
k_B = F / Δx = 2 / 0,025 = 80 N/m
k_C = F / Δx = 1 / 0,025 = 40 N/m
k_D = F / Δx = 2 / 0,05 = 40 N/m
k_E = F / Δx = 2 / 0,25 = 8 N/m
Yankho lolondola ndi E.

23. Kuchokera ku kuyesera kuti mudziwe kulimba kwa rabara pogwiritsa ntchito rabara ya matayala, deta yomwe yapezeka ndi monga momwe zilili patebulo lotsatira. Titha kunena kuti mtengo wokhazikika kwambiri ndi kuyesera….
Zokambirana
Fomula ya lamulo la Hooke:
k = F / Δx
Chokhazikika cha masika:
k_A = 7/0,035 = 200 Nm^-1
k_B = 8/0,025 = 320 Nm^-1
k_C = 6/0,020 = 300 Nm^-1
k_D = 9/0,045 = 200 Nm^-1
k_E = 10/0,033 = 303 Nm^-1
Chokhazikika chachikulu kwambiri cha elastic ndi 320 Nm^-1.
Yankho lolondola ndi B.

Gwero la funso:

Mafunso a National Examination Physics a Senior High School/Vocational High School