4 Izibonelo zochungechunge lwezinhlelo zasentwasahlobo
1. Iziphethu ezinhlanu, ngasinye sinamandla angaguquki angu-200 N/m, zihlelwe ngokulandelana. I-spring constant efanayo yelungiselelo lentwasahlobo ingu…
Ingxoxo
Kuyaziwa ukuthi:
I-constant yentwasahlobo ngayinye (k)1 = k2 = k3 = k4 = k5) = 200 N/m
Kubuziwe: i-spring constant yokufaka esikhundleni (k)
Impendulo:
I-constant yentwasahlobo yokufaka esikhundleni :
1/k = 1/k1 + 1/k2 + 1/k3 + 1/k4 + 1/k5
1/k = 1/200 + 1/200 + 1/200 + 1/200 + 1/200
1/k = 5/200
k = 200/5
k = 40 Newton/imitha
2. Iziphethu ezimbili zihlelwe njengoba kuboniswe ngezansi. Isiphethu ngasinye sino-k ongaguquki1 = 200 N/m kanye ne-k2 = 300 N/m. Isisindo esingu-2 kg silenga entwasahlobo. Uma ukusheshisa ngenxa yamandla adonsela phansi kungu-10 m/s2 khona-ke ukwanda kobude bokuhlanganiswa kwentwasahlobo...
Ingxoxo
Kuyaziwa ukuthi:
I-Spring constant 1 (k)1) = 200 N/m
I-Spring constant 2 (k)2) = 300 N/m
Isisindo somthwalo (m) = 2 kg
Ukusheshisa ngenxa yamandla adonsela phansi (g) = 10 m/s2
Isisindo somthwalo (w) = mg = (2)(10) = 20 amaNewton
Kubuziwe: ukwanda kobude ukuhlelwa kochungechunge lwentwasahlobo (x)
Impendulo:
I-constant yentwasahlobo yokufaka esikhundleni :
1/k = 1/k1 + 1/k2
1/k = 1/200 + 1/300 = 3/600 + 2/600 = 5/600
k = 600/5
k = 120 Newton/imitha
Ukwanda kobude bokuhlanganiswa kwentwasahlobo :
x = F / k = w / k
x = 20/120
x = 1/6 imitha
Ukwanda kobude belungiselelo lentwasahlobo ukwanda kobude obuphelele bemithombo emithathu.
3. Kuhlelwe iziphethu ezintathu ezifanayo njengoba kuboniswe ngezansi. Isisindo esingu-15 Newton silenga ekugcineni kweziphethu okungezansi, okwenza uhlelo lwesiphethu lunde ngo-5 cm. I-spring constant yesiphethu ngasinye…
Ingxoxo
Kuyaziwa ukuthi:
Amandla esisindo (w) = amaNewton angu-15
Ukwanda kobude bokuhlanganiswa kwentwasahlobo = 5 cm = 0,05 amamitha
Kubuziwe: ukuqina kwentwasahlobo ngayinye
Impendulo:
I-Hitung ki-constant yasentwasahlobo yokufaka esikhundleni usebenzisa ifomula Umthetho kaHooke :
k = F / x = w / x
k = 15 / 0,05
k = 300 Newton/imitha
I-constant yentwasahlobo ngayinye :
1/k = 1/k1 + 1/k2 + 1/k3
1/300 = 1/k + 1/k + 1/k
1/300 = 3/k
k = (3)(300)
k =900
k = 900 N/m
Iziphethu ezintathu ziyafana ngakho zinezingqimba ezifanayo. Izingqimba zasentwasahlobo 1 (k)1) = i-spring constant 2 (k2) = i-spring constant 3 (k3) = 900 Newton/imitha
4. Iziphethu ezintathu ngasinye esinomugqa oqondile k ihlelwe ngokulandelana. I-constant yasentwasahlobo ehlanganisiwe…
A. 1/5 k
B. 1/4 k
C. 1/3 k
D. 1/2 k
E. k
Ingxoxo:
Ifomula engaguquki yasentwasahlobo yokuhlelwa kochungechunge :
1/pp = 1/k + 1/k + 1/k
I-constant yasentwasahlobo ehlanganisiwe :
1/pp = 3/k
kp = k/3 = 1/3 k
Impendulo efanele ngu-C.
