Mehlala e 9 ea Molao oa Pascal
1. Sebaka se nang le karolo e tšekaletseng ea jack e 'ngoe le e 'ngoe ea hydraulic ke 0,04 m2 le 0,10 m2Haeba matla a ho kenya e le 5 Newtons, matla a ho hlahisa a phahameng ka ho fetisisa ke afe?
Puisano:
Hoa tsebahala hore:
A1 = 0,04 limithara2
A2 = 0,10 limithara2
F1 = 5N
E botsitsoe: F2 ?
Karabo:
F1/A1 =F2/A2
5/0,04 = F2/ 0,10
125=F2/ 0,10
F 2 = (125)(0,10) = 12,5 N
2. Radius ea karolo e nyane e tšekaletseng ea jeke ea hydraulic ke 2 cm 'me radius ea karolo e kholo e tšekaletseng ke 25 cm. Ke matla a makae a sebelisoang karolong e nyane e tšekaletseng ho phahamisa koloi e boima ba 2000 kg?
Puisano:
Hoa tsebahala hore:
r1 = 2 cm = 0,02 m
r2 = 25 cm = 0,25 m
A1 = (3,14)(0,02)2 = 0,001256 limithara2
A2 = (3,14)(0,25)2 = 0,19625 limithara2
F2 = w = mg = (2000)(9,8 m/s2) = 19600 N
E botsitsoe: F1 ?
Karabo:
F1/A1 =F2/A2
F1/0,001256 = 19600/0,19625
F1/0,001256 = 99.872,6
F 1 = 125,44 N
3. Kgatelelo e phahameng ka ho fetisisa ya gauge hodima jack ya hydraulic ke 10 atm. Ke boima bo bokae bo ka phahamiswang haeba bophara ba sehokelo e le 20 cm?
Puisano:
Hoa tsebahala hore:
Atm e le 1 = 1,013 x 105 N / limithara2
p ho lekanya = 10 atm = (10)(1,013 x 105 N / limithara2) = 10,13 x 105 N / limithara2
F1 = 10,13x105 N / limithara2
A1 = 1 limithara2
A2 = (3,14)(0,10 m)2 = 0,0314 limithara2
E botsitsoe: F2 ?
Karabo:
p = F/A kapa F1/A1 =F2/A2
1013000/1 = F2/ 0,0314
1.013.000=F2/ 0,0314
F 2 = 31.808 N
Boima bo boholo:
w = mg
31.808 = m (9,8)
m = 3.245,7 kg
4. Sheba setšoantšo se latelang!
Sebaka se tšekaletseng A 1 = 10 cm 2
Sebaka se tšekaletseng A 2 = 100 cm 2
Matla (F 1 ) a lokelang ho sebediswa ho tshwara F 2 = 100 N e le hore sistimi e lekane ke …
A. 1.000 Newton
B. 100 Newton
C. 10 Newton
D. 1 Newton
Puisano
Hoa tsebahala hore:
Sebaka se tšekaletseng 1 (A 1 ) = 10 cm 2
Sebaka se tšekaletseng 2 (A 2 ) = 100 cm 2
Matla a 2 (F 2 ) = 100 Newtons
E botsitsoe: Matla a 1 (F 1 )
Karabo:
Sesebelisoa se setšoantšong se kaholimo ke jeke ea hydraulic. Tsela eo jeke ea hydraulic e sebetsang ka eona e thehiloe molaong oa Pascal. Molao oa Pascal o bolela hore khatello e sebelisoang mokelikeling e fetisoa ke mokelikeli ka mahlakoreng 'ohle, 'me likarolo tsohle tsa mokelikeli li ba le khatello e lekanang.
Foromo ea khatello:
P = F / A
Tlhaloso ea foromo: P = khatello, F = matla, A = sebaka sa bokaholimo.
Khatello e fumanoang ke mokelikeli ka har'a phaephe e nyane (P)1) = F1 / TO1.
Khatello e fumanoang ke mokelikeli ka har'a phaephe e kholo (P2) = F2 / TO2
Khatello ea mokelikeli ka har'a phaephe e nyane (P)1) e lekana le kgatello ya mokelikeli o ka hara phaephe e kgolo (P2).
P1 = P.2
F1 / TO1 =F2 / TO2
F 1 / 10 cm 2 = 100 N / 100 cm 2
F 1 / 10 = 1 N
F 1 = (10)(1 N)
F 1 = 10 Newton
Karabo e nepahetseng ke C.
5. Sheba setšoantšo se ka tlase!
Haeba sebaka sa karolo e tšekaletseng sa A 1 = 0,001 m2 le A 2 = 0,1 m2 , joale boholo ba matla a khatello ho A 2 ke...
A. 100 N
B. 1.000 N
C. 10.000 N
D. 100.000 N
Puisano
Hoa tsebahala hore:
Sebaka se tšekaletseng 1 (A 1 ) = 0,001 m 2
Sebaka se tšekaletseng 2 (A 2 ) = 0,1 m 2
Matla sebakeng se tšelang karolo 1 (F 1 ) = 100 Newton
Potso: Matla sebakeng se tšekaletseng 2 (F 2 )
Karabo:
Molao oa Pascal o bolela hore khatello e sebelisoang mokelikeling e fetisetsoa ke mokelikeli ka mahlakoreng 'ohle, moo likarolo tsohle tsa mokelikeli li nang le khatello e lekanang.
P1 = P.2
F1 / TO1 =F2 / TO2
100 N / 0,001 m 2 = F 2 / 0,1 m 2
100 N / 0,001 = F 2 / 0,1
100.000 N = F 2 / 0,1
F 2 = (0,1)(100.000 N)
F 2 = 10.000 N
Karabo e nepahetseng ke C.
6. Sheba setšoantšo!
Koloi e boima ba 16.000 N e beoa piston B joalo ka ha ho bontšitsoe setšoantšong. Ho phahamisa koloi, ho hlokahala matla a F a….
A. 50 N
B. 80 N
C. 200 N
D. 400 N
Puisano
Hlahisa diyuniti tsohle ho diyuniti tsa matjhaba
Hoa tsebahala hore:
Boima ba koloi (w) = 16.000 N
Sebaka sa bokaholimo B (A B ) = 4000 cm 2 = 4000 / 10.000 m 2 = 4 / 10 m 2 = 0,4 m 2
Sebaka sa bokaholimo A (A A ) = 50 cm 2 = 50 / 10.000 m 2 = 0,005 m 2
E botsitsoe: Force F
Karabo:
Matla F a balwa ho sebediswa foromo ya molao ya Pascal.
F / A A = w / A B
F / 0,005 m 2 = 16.000 N / 0,4 m 2
F / 0,005 = 16.000 N / 0,4
F / 0,005 = 40.000 N
F = (40.000 N)(0,005)
F = 200 Newton
Karabo e nepahetseng ke C.
7. Sheba setšoantšo sa sesebelisoa sa haeteroliki se bōpehileng joaloka U ka tlase!
Boima ba boloko X holim'a tube e nyane ho boloka sesebelisoa sa haeteroliki se leka-lekane ke….
A. 5 N
B. 25 N
C. 10.000 N
D. 25.000 N
Puisano
Hoa tsebahala hore:
Sebaka se ka holimo sa silindara e nyane (A)1) = 5 cm2
Sebaka se ka holimo sa silindara e kholo (A)2) = 100 cm2
Matla a khoheli a boloko holim'a silindara e kholo (F)2) = 500 Newton
Potso: Matla a khoheli a boloko holim'a phaephe e nyane (F)1)
Karabo:
Sesebelisoa se setšoantšong se kaholimo ke jeke ea hydraulic. Tsela eo jeke ea hydraulic e sebetsang ka eona e thehiloe molaong oa Pascal. Molao oa Pascal o bolela hore khatello e sebelisoang mokelikeling e fetisoa ke mokelikeli ka mahlakoreng 'ohle, 'me likarolo tsohle tsa mokelikeli li ba le khatello e lekanang.
Ha bokaholimo ba phaephe e nyane bo hatelloa, mokelikeli o ka hara phaephe e nyane le wona o hatelloa. Kgatello e utluoang ke mokelikeli o ka hara phaephe e nyane e fetisetsoa ho mokelikeli o ka hara phaephe e kgolo. Mokelikeli o ka hara phaephe e kgolo o na le kgatello e tshwanang le ya mokelikeli o ka hara phaephe e nyane. Ka lehlakoreng le leng, kgatello e utluoang ke mokelikeli o ka hara phaephe e kgolo e fetisetswa ho mokelikeli o ka hara phaephe e nyane. Mokelikeli o ka hara phaephe e nyane o na le kgatello e tshwanang le e utluoang ke mokelikeli o ka hara phaephe e kgolo.
Foromo ea khatello:
P = F / A
Tlhaloso ea foromo: P = khatello, F = matla, A = sebaka sa bokaholimo.
Khatello e fumanoang ke mokelikeli ka har'a phaephe e nyane (P)1) = F1 / TO1.
Khatello e fumanoang ke mokelikeli ka har'a phaephe e kholo (P2) = F2 / TO2
Khatello ea mokelikeli ka har'a phaephe e nyane (P)1) e lekana le kgatello ya mokelikeli o ka hara silindara e kgolo P2).
P1 = P.2
F1 / TO1 =F2 / TO2
F1 / Cm 52 = 500 N / 100 cm2
F1 / 5 = 500 N / 100
F1 / 5 = 5 N
F1 = (5)(5) N
F1 = 25N
Karabo e nepahetseng ke B.
8.
Ela hloko moralo o latelang oa phaephe ea Pascal!
Haeba matla a khatello F1 = 300 N. Boholo ba matla F2 hore ho be le tekano ke….
A. 72 N
B. 1250 N
C. 1500 N
D. 3600 N
Puisano
Hoa tsebahala hore:
Sebaka se ka holimo sa silindara e nyane (A)1) = 12 cm2
Sebaka se ka holimo sa silindara e kholo (A)2) = 50 cm2
Boholo ba matla a khatello holim'a phaephe e nyane (F)1) = 300 Newton
Potso: Boholo ba matla a khatello holim'a phaephe e kholo (F)2)
Karabo:
Khatello ea mokelikeli ka har'a phaephe e nyane (P)1) e lekana le kgatello ya mokelikeli o ka hara phaephe e kgolo (P2).
P1 = P.2
F1 / TO1 =F2 / TO2
300 N / 12 cm2 =F2 / Cm 502
300 N / 12 = F2 / 50
25 N = F2 / 50
F2 = (50)(25) N
F2 = 1250N
Karabo e nepahetseng ke B.
9.
Sheba setšoantšo se latelang sa sesebelisoa sa Pascal!
Boholo ba matla (F) a lokelang ho sebediswa ho netefatsa hore boemo ba sesebediswa bo leka-lekane ke….
A. 100 Newton
B. 250 Newton
C. 600 Newton
D. 4800 Newton
Puisano
Hoa tsebahala hore:
Sebaka se ka holimo sa silindara e nyane (A)1) = 4 cm2
Sebaka se ka holimo sa silindara e kholo (A)2) = 16 cm2
Boholo ba matla a khoheli holim'a phaephe e kholo (F)2) = 1000 Newton
Potso: Boholo ba matla a holim'a tube e nyane (F)1)
Karabo:
Khatello ea mokelikeli ka har'a phaephe e nyane (P)1) e lekana le kgatello ya mokelikeli o ka hara phaephe e kgolo (P2).
P1 = P.2
F1 / TO1 =F2 / TO2
F1 / Cm 42 = 1000 N / 16 cm2
F1 / 4 = 1000 N / 16
F1 / 1 = 1000 N / 4
F1 = 1000 N / 4
F1 = 250N
Karabo e nepahetseng ke B.
Mohloli oa lipotso:
Lipotso tsa Tlhahlobo ea Naha ea Saense ea Sekolo se Phahameng sa Bana ba Banyenyane/Sekolo se Phahameng sa Boislamo
Lipotso tsa molao oa Pascal
1. Sebaka se nang le karolo e tšekaletseng ea jack e 'ngoe le e 'ngoe ea hydraulic ke 0,03 m2 le 0,12 m2Haeba matla a ho kenya e le 6 Newtons, matla a ho hlahisa a phahameng ka ho fetisisa ke afe?
(24 N)
2. Radius ea karolo e nyane e tšekaletseng ea jeke ea hydraulic ke 1,5 cm 'me radius ea karolo e kholo e tšekaletseng ke 20 cm. Ke matla a makae a sebelisoang karolong e nyane e tšekaletseng ho phahamisa koloi e boima ba 2200 kg?
(121,3 N)
3. Kgatelelo e phahameng ka ho fetisisa ya gauge hodima jack ya hydraulic ke 14 atm. Ke boima bo bokae bo ka phahamiswang haeba bophara ba sehokelo e le 30 cm?
(Lik'hilograma tse 10.224)
