Zitsanzo 3 za Mafunso Othamanga Kwambiri
1. M'mawa uliwonse, Hadi nthawi zonse amathamanga mozungulira bwalo la mamita 100 x 400 nthawi 12 mu ola limodzi. Liwiro lapakati ndipo liwiro lapakati la kayendedwe ka Hadi ndi...
A. 0 km/h ndi 12 km/h
B. 0 km/h ndi 6 km/h
C. 6 km/ola ndi 12 km/ola
D. 6 km/h ndi 6 km/h
E. 12 km/h ndi 12 km/h
Zokambirana
Amadziwika kuti:
Kutalika kwa munda = mamita 400
M'lifupi mwa munda = mamita 100
Mzere wa munda = (2 x 400 metres) + (2 x 100 metres) = 800 metres + 200 metres = 1000 metres
Mtunda wa Hadi = 12 x 1000 mamita = 12.000 mamita = 12 makilomita
Yafunsidwa: Liwiro lapakati ndi liwiro lapakati
Yankho:
Liwiro lapakati:
Hadi anazungulira bwalo ka 12, zomwe zikutanthauza kuti atathamanga, Hadi anabwerera pamalo ake oyambirira, kotero kusamuka kwake kunali zero. Popeza kusamuka kunali zero, liwiro lapakati linali zero.
Liwiro lapakati:
Liwiro lapakati = mtunda wonse woyenda / nthawi yonse = 12 km / ola limodzi = 12 km/ola
Yankho lolondola ndi A.
2. Chithunzi chomwe chili pambali chikuwonetsa ubale pakati pa mtunda (s) ndi nthawi (t) ya chinthu choyenda. Ngati s ili mu m, ndipo t ili mu masekondi, ndiye kuti liwiro lapakati la chinthucho ndi...
A. 0,60 ms -1
B. 1,67 ms -1
C. 2,50 ms -1
D. 3,0 ms -1
E. 4,6 ms -1
Zokambirana
Liwiro lapakati = Mtunda wonse woyenda / Nthawi yonse yopuma
Liwiro lapakati = mamita 15 / masekondi 6 = mamita 2,5/sekondi
Yankho lolondola ndi C.
3. Tinthu tating'onoting'ono timasuntha kumpoto kuchokera poyambira (0,0) kupita ku mfundo P (2,4) m'masekondi atatu. Tinthu tating'onoting'ono timatembenukira kum'mawa kwa masekondi awiri mpaka titafika pa mfundo Q (10,10). Liwiro lapakati pamene tinthu tating'onoting'ono timasuntha kuchokera ku P kupita ku Q ndi lofanana ndi….
A. 2 ms-1
B. 5 ms -1
C. 7 ms -1
D. 10 ms -1
E. 12 ms -1
Zokambirana
Kusamutsa kwa PQ:
Liwiro lapakati:
Yankho lolondola ndi B.
4. Ngati liwiro lapakati la chinthu ndi zero, ndiye kuti...
A. zinthu zomwe zimayenda pa liwiro losasintha
B. Mtunda woyenda ndi wofanana ndi zero
C. zinthu zomwe zimayenda mmbuyo ndi mtsogolo
D. kusamuka kwa chinthucho kuli kofanana ndi zero
E. liwiro lapakati la chinthu ndi lofanana ndi zero
Zokambirana
Fomula ya liwiro la avareji = kusamuka konse / nthawi yonse
Ngati liwiro lapakati la chinthu ndi zero, ndiye kuti kusamuka kwa chinthucho ndi zero.
Yankho lolondola ndi D.
Gwero la funso:
Mafunso a National Examination Physics a Senior High School/Vocational High School
