Maaddada Dhaqdhaqaaqa Tooska ah
Dhaqdhaqaaqu waa dhacdo aan si joogto ah ugu aragno nolol maalmeedka. Laanta fiisikiska ee barata dhaqdhaqaaqa waxaa loo yaqaan farsamoyaqaanno. Laanta farsamoyaqaannada ee ka hadasha sida shay u dhaqaaqo, iyada oo aan la tixgelin sababta dhaqdhaqaaqa, waxaa loo yaqaan kinematics . Taas bedelkeeda, laanta farsamoyaqaannada ee ka hadasha sababaha dhaqdhaqaaqa oo sharaxda sababta walxaha u dhaqaaqaan sida ay u dhaqaaqaan waxaa loo yaqaan firfircooni. Mawduucan, shay kasta oo dhaqaaqa waxaa loo arkaa sidii inay tahay qayb ama dhibic (.). Walxaha dhaqaaqa waxaa loo arkaa inay yihiin dhibco si fudud loogu fududeeyo falanqaynteena. Bal qiyaas haddii dhibic ay ku dhaqaaqdo xariiq toosan, markaa jidkeedu wuxuu samayn doonaa xariiq toosan.
Shay waxaa la yiraahdaa inuu ku jiro dhaqdhaqaaq toosan haddii waddadiisu toosan tahay. Haddii waddadiisu qaloocsan tahay, shaygu kuma jiro dhaqdhaqaaq toosan. Dhaqdhaqaaqa shayga, oo loo arko inuu yahay qayb, waa hal-cabbir. Dhaqdhaqaaqa hal-cabbir ah wuxuu ku dhici karaa si toosan (isbarbardhig dhidibka x) ama si toosan (isbarbardhig dhidibka y).
Tusaalaha dhibaatooyinka
1. Su'aalaha Imtixaanka Qaranka ee 2017
Sawirka fiiri!
Masaafada ugu badan ee uu walax ku safro muddo waqti ah...
A. 0 ilbiriqsi ilaa 10 ilbiriqsi
B. 10 ilbiriqsi ilaa 20 ilbiriqsi
C. 20 ilbiriqsi ilaa 30 ilbiriqsi
D. 30 ilbiriqsi ilaa 50 ilbiriqsi
E. 50 ilbiriqsi ilaa 70 ilbiriqsi
Dood
Qaacidada masaafada:
s = vt
Masaafada = meel hadhsan.
Masaafada ugu weyn = aagga ugu weyn.
A. ½ (10-0)(20-0) = ½ (10)(20) = (5)(20) = 100
B. (20-10)(10-0) + (½)(20-10)(20-10) = (10)(10) + ½ (10)(10) = 100 + (5)(10) = 100 + 50 = 150
C. (30-20)(10-0) = (10)(10) = 100
D. (50-30)(10-0) = (20)(10) = 200
E (70-50) (10-0) + ½ (70-50) (30-10) = (20) (10) + ½ (20) (20) = 200 + (10) (20) = 200 + 200 = 400
Jawaabta saxda ah waa E.
2. Su'aalaha Imtixaanka Qaranka ee 2017
Walax kor u socota ayaa u hoggaansan isla'egta y = 8t – t 2 , iyadoo y iyo t ay yihiin mitir iyo ilbiriqsiyo, siday u kala horreeyaan. Xawaaraha shayga ee t = 2 ilbiriqsi waa…
A. 2 ms -1
B. 4 ms -1
C. 8 ms -1
D. 12 ms -1
E. 16 ms -1
Dood
y = 8t – t 2
v = 8 – 2t
Xawaaraha shayga t = 2 ilbiriqsi:
v = 8 – 2t = 8 – 2(2) = 8 – 4 = 4 m/s.
Jawaabta saxda ah waa B.
3. Su'aalaha Imtixaanka Qaranka ee SMA/MA 2017
Fiiri jadwalka xogta xawaaraha ee saddexda shay ee soo socda!
Iyada oo ku saleysan jadwalka, waxaa lagu soo gabagabeyn karaa in shayga ugu dhaqsaha badan uu yahay...
A. Shayga A ee t 1 – t 2
B. Shayga A ee t 2 – t 3
C. Shayga B ee t 1 – t 2
D. Shayga C ee t 1 – t 2
E. Shayga C ee t 2 – t 3
Dood
Shayga A: xawaaraha shayga wuxuu kordhaa 4 m/s 2dii ilbiriqsiba mar ama 2 m/s 1dii ilbiriqsiba mar = 2 m/s 2.
Shayga B: xawaaraha shayga wuxuu kordhaa 5 m/s labadii ilbiriqsiba mar ama 2,5 m/s 1 ilbiriqsi kasta = 2,5 m/s 2.
Shayga C: xawaaraha shayga ayaa hoos u dhaca 2 m/s 2dii ilbiriqsiba mar ama 1 m/s 1dii ilbiriqsiba mar = -1 m/s 2.
Jawaabta saxda ah waa C.
