2 Tusaalooyin su'aalo awoodeed
Awooddu waa heerka shaqada lagu qabto ganacsi ama dadaallo la sameeyay muddo cayiman.
Metametrik ahaan, awooddu waa saamiga dadaalka iyo waqtiga.
P=W/t
Sharaxaad: P = awood (cutub Joule/ilbiriqsi), W = shaqo (Joule) iyo t = waqtiga u dhexeeya (ilbiriqsi)
Iyada oo lagu salaynayo isla'egtan, waxaa la soo gabagabeyn karaa in heerka shaqada la qabanayo uu sii badanayo, awoodda la qabanayo ay sii badanayso, lidkeedana, heerka shaqada la qabanayo oo sii yaraanaya, awoodda ayaa sii yaraanaysa.
Awooddu waa tiro cabbir ah. Nidaamka caalamiga ah ee cutubyada awoodda waa joule/ilbiriqsi. Joule/ilbiriqsi = watt (oo loo soo gaabiyo W), oo loogu magac daray James Watt.
Nidaamka cutubyada awoodda Ingiriiska waa 1 rodol-foot-force ilbiriqsikiiba. Cutubkani aad buu u yar yahay ujeeddooyin wax ku ool ah, sidaa darteed cutub ka weyn, oo ah faras-wade (oo loo soo gaabiyo hp), ayaa la isticmaalaa. 1 faras-wade = 550 rodol-foot-force ilbiriqsikiiba = 764 watts = ¾ kilowatt.
Tirada shaqada waxaa sidoo kale lagu sheegi karaa cutubyo awood x ah, tusaale ahaan saacadaha kilowatt ama KWH (Kilo Watt Hour). Hal KWH waa shaqada lagu sameeyo xawaare joogto ah oo ah 1 kiilo Watt muddo 1 saac ah.
1. Qof miisaankiisu yahay 50 kg ayaa jaranjaro dhererkeedu yahay 10 mitir 2 daqiiqo fuulaya. Haddii dardargelinta cufisjiidadka awgeed (g) ay tahay 10 m/s2 markaas awoodda la soo saaray waa...
Dood
Waa la garanayaa :
Cufnaanta (m) = 50 kg
Dhererka (h) = 10 mitir
Dardargelinta cufisjiidadka awgeed (g) = 10 m/s2
Muddada u dhaxaysa (t) = 2 daqiiqo = 2 (60) = 120 ilbiriqsi
La weydiiyay : awood (P)
Jawab :
Qaacidada awoodda :
P=W/t
Sharaxaad: P = awood, W = shaqo, t = waqti
Qaacidada Ganacsiga :
W = Fs = wh = mgh
Sharaxaad: W = dadaal, F = xoog, w = cufisjiidadka, s = barokac, h = dherer, m = cuf, g = dardargelinta cufisjiidadka.
Marka la fuulayo jaranjarada, xoogga cufisjiidadka ayaa qofka ku shaqeeya. Shaqada uu qabto xoog muxaafid ah sida cufisjiidadka waxay ku xiran tahay oo keliya isbeddelka dhererka. Shaqada uu qabto xoogga cufisjiidadka waxay sababtaa in tamarta cufisjiidadka ee qofka ay kordho. Shaqada uu qabto xoogga cufisjiidadka ee qofka ku dhacda waa:
W = mgh = (50)(10)(10) = 5000 Joules.
Markaa awoodda la dhaliyo marka qofku uu fuulo jaranjarada waa:
P = W / t = 5000 / 120 = 41,7 Joules/ilbiriqsi.
2. Qof miisaankiisu yahay 60 kg ayaa geed qumbaha ah ku fuula dhererkiisu yahay 5 mitir 10 ilbiriqsi gudahood. Xoogga loo baahan yahay si loo fuulo geedka qumbaha waa… g = 10 m/s2
Dood
Waa la garanayaa :
Cuf (m) = 60 kg
Dhererka (h) = 5 mitir
Dardargelinta cufisjiidadka awgeed (g) = 10 m/s2
Muddada (t) = 10 ilbiriqsi
La weydiiyay Awood
Jawab :
Ganacsiga:
W = mgh = (60)(10)(5) = 3000 Joules
Awood:
P = W / t = 3000 / 10 = 300 Joules/ilbiriqsi.
