Kahor intaadan soo saarin qaacidada muraayadda qaloocan, marka hore faham dhowr xeer oo loogu talagalay calaamadaha. muraayad qaloocan.
Xeerarka Calaamadaha Muraayadda Concave
- Masaafada walxaha (yada)
Haddii shay uu hor yaal muraayadda oo iftiiminaysa markaa masaafada shayga (s) waa mid togan.
- Masaafada sawirka (yada)
Haddii hoosku uu hor yaallo muraayad iftiin ka tarjumaysa, halkaas oo iftiinku uu dhex maro hooska, markaas Masaafada hooska (yada) waa sawir togan (sawir dhab ah). Haddii sawirku ka dambeeyo muraayadda dusha sare ee iftiimisa iftiinka, halkaas oo iftiinku aanu dhex marin sawirka, markaas Masaafada hooska waa taban (sawir casri ah).
- Gacanka qalooca (R)
Bartamaha qalooca muraayadda qalooca waxay ku taal horteeda dusha muraayadda ee milicsanaysa, sidaas darteed gacanka qalooca muraayadda qalooca leh waa togan yahay. Haddii gacanka qalooca uu yahay togan, dhererka diiradda (f) sidoo kale waa togan yahay.
- Dhererka shayga (h)
Haddii shaygu uu ka sarreeyo dhidibka ugu weyn ee muraayadda qaloocan markaas dhererka shayga (h) waa togan (shay toosan). Taas bedelkeeda, haddii shaygu uu ka hooseeyo dhidibka ugu weyn ee muraayadda qaloocan markaa dhererka shayga waa taban (shay rogrogay).
- Dhererka hooska (h')
Haddii sawirku ka sarreeyo dhidibka ugu weyn ee muraayadda qaloocan, markaas dhererka sawirka (h') waa togan yahay (sawirku waa toosan yahay). Haddii sawirku ka hooseeyo dhidibka ugu weyn ee muraayadda qaloocan, dhererka sawirku waa taban (sawirku waa rogrogmay).
- Weyneynta sawirka (m)
Haddii weynaynta sawirka > 1 markaas cabbirka sawirku wuu ka weyn yahay cabbirka shayga. Haddii weynaynta sawirku = 1 markaas cabbirka sawirku wuxuu la mid yahay cabbirka shayga. Haddii weynaynta sawirku < 1 markaas cabbirka sawirku wuu ka yar yahay cabbirka shayga.
Qaaciddada Muraayadda Concave
Fiiri sawirka hoose. Waxaa jira laba iftiin oo lagu sawiray muraayad qaloocan, ka dibna iftiinka waxaa ka muuqda muraayad qaloocan. 
Cinwaan:
s = masaafada shayga, s' = masaafada sawirka, h = P P' = dhererka shayga, h' = Q Q' = dhererka sawirka, F = barta diiradda ee muraayadda qaloocan.
Sawirka kore, laba iftiin ayaa lagu sawiray, kuwaas oo kala ah P'BFQ' iyo P'AQ'. Iftiinka P'AQ' wuu qanciyaa. sharciga iftiiminta iftiinka sidaas darteed saddexagal P'AP wuxuu la mid yahay Q'AQ. Sidaas darteed:
Iftiinka P'BFQ', saddexagal BFA wuxuu la mid yahay QFQ' halkaas oo masaafada AB = dhererka shayga (h) iyo masaafada FA = dhererka diiradda (f) ee muraayadda qaloocan. Sidaas darteed:
Dhinacyada bidix iyo midig ee isle'egyada 1 iyo 2 waa siman yihiin, sidaas darteed dhinacyada midig waa la siman yahay:
Labada dhinac ee isla'egta ku dhufo s':
Sharaxaadda qaacidada:
s = masaafada shayga (togan haddii shaygu uu hor yaal muraayadda dusha sare ee muraayadda oo iftiiminaysa iftiinka)
s' = masaafada sawirka (togan haddii sawirka shaygu uu hor yaal muraayadda dusha sare ee muraayadda oo iftiiminaysa iftiinka ama sawirku uu dhab yahay)
f = dhererka diiradda (togan haddii barta diiradda ee muraayadda qallafsan ay ku taal horteeda dusha muraayadda qallafsan ee iftiimisa iftiinka)
Had iyo jeer xasuuso xeerka calaamadda muraayadda qaloocan marka aad isticmaaleyso qaacidadan si aad u xalliso dhibaatooyinka muraayadda qaloocan.
Weyneynta Sawirka (m)
Fiiri sawirka sameynta hooska shayga ee kor ku xusan. Saddexagalyada PAP' iyo QAQ' waa isku mid, sidaa darteed waxaan soo saari karnaa xiriirka ka dhexeeya masaafada shayga iyo masaafada hooska iyadoo la adeegsanayo dhererka shayga iyo dhererka hooska:
Macluumaadka:
h = dhererka shayga (togan haddii shaygu ka sarreeyo dhidibka ugu weyn ee muraayadda qaloocan ama shay toosan. Taban haddii shaygu uu kor u jeedo)
h' = dhererka sawirka (togan haddii sawirku ka sarreeyo dhidibka ugu weyn ee muraayadda qaloocan ama sawirka toosan. Taban haddii sawirku rogman yahay)
s = masaafada shayga (togan haddii shayga uu maro iftiinka dhacdada)
s' = masaafada sawirka (togan haddii sawirka uu dhex maro iftiin ama sawir dhab ah. Taban haddii sawirka uusan dhex marin iftiin ama sawir dalwaddeed)
Qaacidada kore waxaa dib loogu qori karaa sida hoos ku xusan iyadoo lagu darayo calaamadda m:
Macluumaadka:
m = weyneynta sawirka
Su'aalaha Tusaalaha ah ee Muraayadda Concave
Baro tusaale muraayad qaloocan si aad si fiican u fahamto sida loo isticmaalo qaacidada muraayadda ee wareegsan.
1. Ilmo ayaa hor taagan muraayad qaloocan si sawirka la sameeyay uu u toosan yahay oo uu labanlaab u weynaado naftiisa. Haddii qalooca muraayaddu yahay 3,00 m, markaa masaafada ilmuhu u jiro muraayadda waa…
A. 0,75 mitir
B. 1,50 mitir
C. 2,25 mitir
D. 3,00 mitir
E. 4,50 mitir
Dood
Waa la ogyahay:
Weyneynta Sawirka (M) = 2
Dhererka diiradda (f) = 1/2 R = 1/2 (3) = 1,5 mitir
La weydiiyay: masaafada dadka
Jawaab:
Muraayad qaloocan, haddii sawirku toosan yahay markaas masaafada sawirku waa taban. Taas macnaheedu waa in hoosku yahay mid casri ah ama hoosku uu ka dambeeyo muraayadda qaloocan halkaas oo iftiinka iftiinku uusan dhex marin hooska.
Qaacidada weynaynta hooska:
M = -s'/s
2 = -s'/s
s' = -2 s
Xisaabi masaafada dadka:
1/s + 1/-s' = 1/1,5
1/s + 1/-2s = 1/1,5
2/2 – 1/2 = 1/1,5
1/2 = 1/1,5
2s = (1,5)(1)
2s = 1,5
s = 1,5/2
s = 0,75 m
Jawaabta saxda ah waa A.
Isha su'aasha:
Su'aalaha Fiisigiska ee SBMPTN
