Mienzaniso mishanu yeMibvunzo yeSimba Rinogona Kuitika
Simba Rinogona Kukweva Simba
1. Majoules esimba 4.900 anoshandiswa kusimudza chinhu chinorema 50 kg chakamira. Chinhu chacho chinokwira kusvika pakukwirira kwe … (g = 9,8 ms -2 )
A. 0,1 m
B. 10 m
C. 98 m
D. 245 m
E. 960 m
Kukurukurirana
Zvinozivikanwa kuti:
Kuchinja kwesimba rinogona kuwanikwa (ΔEP) = 4900 Joules
huremu hwechinhu (m) = 50 kg
Kukurumidza kunokonzerwa negiravhiti (g) = 9,8 m/s 2
Chinodiwa: Chinhu chichakwira kusvika (Δh)
Mhinduro:
ΔEP = mg Δh
4900 = (50)(9,8) Δh
Δh = mamita gumi
Mhinduro chaiyo ndeiyi B.
Simba Rinogona Kuwanikwa reChirimo
2. Girafu rinotevera rinoratidza hukama huripo pakati peF (simba) na x (kuwedzera kureba) kwechitubu. Kana chitubu chikakanganiswa ne8 cm, saka simba rinogona kushandiswa nechitubu...
A. 1,6 × 10-5 Joule
B. 6,4 × 10 -4 Joules
C. 8 Joule
D. 16 Joule
E. 128 Joules
Kukurukurirana
Zvinozivikanwa kuti:
Simba (F) = 2 Newtons
Kuwedzera kureba (x) = 1 cm = 1/100 mita = 0,01 mita
Kutsauka kwechitubu = 8 cm = 8/100 metres = 0,08 metres
Mubvunzo: Simba rinogona kuwanikwa muchirimo
Mhinduro:
Shandisa data riri pagirafu kuti uverenge chisipiti chinoramba chiripo.
Simba rinogona kuwanikwa muchirimo:
∆ EP = 1/2 kx 2
∆ EP = 1/2 (200 N/m) (0,08 m) 2
∆ EP = (100 N/m)(0,0064 m 2 )
∆ EP = 0,64 Nm
3. Pakati pemamiriro ezvinhu anotevera ezvinhu:
(1) Rabha rakatambanudzwa rechipfuramabwe
(2) Pendulum yakatsauka
(3) Simbi inopisa
Zvinhu zvine simba rinogona kugoneka zvakaverengerwa...
A. (1)
B. (1) uye (2)
C. (2)
D. (2) na (3)
E. (3)
Kukurukurirana
(1) Rabha rakatambanudzwa rechipfuramabwe
Kana rabha yakatambanudzwa, ine simba rinoita kuti irambe ichitenderera.
(2) Pendulum yakatsauka
Kana pendulum ikatsauswa, pendulum ine simba rekukwevera pasi.
Mhinduro chaiyo ndeiyi B.
4. Tafura iri pazasi inoratidza mhedzisiro yechirimo chine mutoro kumucheto mumwe. F inomiririra huremu hwemutoro uye ∆L inomiririra kuwedzera kwehurefu. Verenga basa rinodiwa kuti chirimo chiwedzere ne10 cm.
A. 2,0 Joule
B. 2,5 Joule
C. 5,0 Joule
D. 7,6 Joule
E. 10 majoules
Kukurukurirana
Zvinozivikanwa kuti:
Kuwedzera kwehurefu hwechitubu (∆L) = 10 cm = 0,1 metres
Mubvunzo: Kuedza kuwedzera chitubu ne 10 cm
Mhinduro:
Shandisa data riri patafura kuti uverenge chitubu chisingachinji:
k = F / ∆x = 20 N / 0,04 m = 500 N/m
k = F / ∆x = 30 N / 0,06 m = 500 N/m
k = F / ∆x = 40 N / 0,08 m = 500 N/m
Chitubu chinogara kwenguva refu i500 N/m
Kuedza kuwedzera chitubu ne 10 cm ndekwekuti:
W = 1/2 k ∆L 2 = 1/2 (500 N/m)(0,1 m) 2 = (250 N/m)(0,01 m 2 ) = 2,5 Newton metres = 2,5 Joules.
Mhinduro chaiyo ndeiyi B.
5. Girafu (Fx) inoratidza hukama huripo pakati pesimba nekuwedzera kwehurefu hwechitubu. Hukuru hwesimba rinokwanisa kushandiswa nechitubu zvichibva pagirafu iri pamusoro apa ndehwekuti…
A. 20 joules
B. 16 joules
C. 3,2 majoules
D. 1,6 majoules
E. 1,2 majoules
Kukurukurirana
Zvinozivikanwa kuti :
F = 40 Newton
Δ x = 0,08 mamita
Mubvunzo : Simba rinogona kuwanikwa muchirimo here?
Mhinduro :
Chirimo chinogara chiripo:
k = F / Δ x
Simba rinogona kuwanikwa muchirimo:
EP = ½ k Δ x 2 = ½ (F/ Δ x) Δ x 2 = ½ F Δ x
EP = ½ (40)(0,08) = (20)(0,08) = 1,6 Joules
Mhinduro chaiyo ndiD.
Kwakabva mubvunzo:
Mibvunzo yeNational Examination Physics yeChikoro Chesekondari/Chikoro Chepamusoro Chebasa
