Fomura Yebasa uye Dzidziso Yesimba reBasa-Kinetic

Mibvunzo yemuenzaniso uye mafomula ebasa uye dzidziso yesimba rekushanda-kinetic

Bhizinesi

1. Muzukuru anosunda wiricheya yaambuya vake mupaki yakatenderera nesimba re20 N, nzvimbo yepaki iri 7 m, muzukuru anoita basa rakawanda sei pakutenderera kaviri?

1. 0 joules
2. 1400 joules
3. 1540 joules
4. 1760 joules

Kukurukurirana
Fomura yeBhizinesi: Basa = Simba x Kudzingwa
Kana muzukuru akasunda wiricheya kaviri, muzukuru newiricheya vanodzokera panzvimbo dzavo dzepakutanga. Sezvo kudzokera panzvimbo dzavo dzepakutanga kuri zero, kusuduruka kuri zero.
Saka kuedza kwakaitwa nemuzukuru hakuna.
Mhinduro chaiyo ndiA.

2. Muchengeti wemba anosunda kabhineti pasi nesimba re350 N. Pasi rine simba rekukweshana re70 N. Basa rinoitwa rekufambisa kabhineti mamita matanhatu nderekuti:

1. 45 J
2. 72 J
3. 1680 J
4. 2580 J

Kukurukurirana
Zvinozivikanwa kuti:
Simba rekusundira (F) = 350 Newton
Simba rekukweshana (F)_sveta) = 70 Newton
Kutamiswa kwekabati (s) = mamita matanhatu
Akabvunzwa: Bhizinesi (W)
Mhinduro:
Kune masimba maviri anoshanda pachinhu, anoti simba rinosunda (F) uye simba rinokweshana (F)._sveta).
Simba rekusunda riri munzira imwecheteyo nekusunda kwekabati, saka simba rekusunda rinoita basa rakanaka. Kusiyana neizvi, simba rekusveta riri munzira yakasiyana nekusunda kwekabati, saka simba rekusveta rinoita basa rakaipa.
Basa rinoitwa neboka rinosundidzira:
W = F s = (350 Newton)(mamita 6) = 2100 Newton metres = 2100 Joules
Basa rinoitwa nesimba rekukweshana:
W = – (F)_sveta)(s) = – (70 Newton)(mamita matanhatu) = – 420 Newton metres = – 420 Joules
Kushanda nesimba kwakazara:
Huwandu hwese = 2100 Joules – 420 Joules
H yose = 1680 Joule
Mhinduro chaiyo ndiC.

Dzidziso yesimba rekushanda-kinetic

3. Simba risingaperi re8 N rinoshanda pachinhu chine huremu hwe16 kg. Kana chinhu chacho chakamira pakutanga, saka kumhanya kwechinhu mushure mekushanda kwesimba kwemasekondi mana ndiko….

1. 0,5 m / s
2. 2 m / s
3. 4 m / s
4. 8 m / s

Kukurukurirana
Zvinozivikanwa kuti:
Simba risingaperi (F) = 8 Newton
Huremu hwechinhu (m) = 16 kg
Kumhanya kwekutanga kwechinhu (v)_o) = 0 m/s
Nguva iyo simba rinoshanda pachinhu (t) = masekondi mana
Akabvunzwa: Kumhanya kwekupedzisira kwechinhu (v)_t)
Mhinduro:
Basa = Shanduko musimba rekinetic
W = EK yekupedzisira - EK yekutanga
W = ½ mv_t² – ½ mv_o²
W = ½ mv_t² - 0
W = ½ mv_t² —— Equation 1

Basa = Simba x Kudzingwa
W = F s
W = 8 s
Shandisa fomura yeGLBB kuverenga displacement (s)
s = v_o t + ½ pa²
Tsananguro: s = kutama, v_o = kumhanya kwekutanga, t = nguva, a = kumhanya
s = 0 + ½ pa² = ½ pa² —-> a = (v)_t - v_o) / t = v_t
s = ½ (v)_t / t) t²
s = ½ (v)_t) t
Tsiva displacement (s) mu equation yebasa ne displacement (s) mu equation iyi:
W = 8 s
W = 8(1/2)(v)_t(t)
W = (4)(v)_t)(t) —— Equation 2

Equation 1 = Equation 2
W = W
½ mv_t² = (4)(v)_t(t)
½ mv_t = (4)(t)
½ (16)(v)_t) = 4(4)
8 v_t = 16
v_t = 16/8
v_t = mamita maviri/sekondi
Mhinduro chaiyo ndeiyi B.

4. Kuwedzera kumhanya kwechinhu kusvika pakukurumidza kwacho kwakapetwa kaviri, kuedza kwe...

1. simba rayo rekutanga rekinetic rakapetwa katatu
2. simba rayo rekutanga rekinetic rakapetwa katatu
3. simba rayo rekutanga rekinetic rakapetwa katatu
4. simba rayo rekutanga rekinetic rakapetwa katatu

Kukurukurirana
Zvinozivikanwa kuti:
Ngatitii huremu hwechinhu (m) = 1 kg
Ngatitii kumhanya kwekutanga (v)_o) = 1 m/s
Kumhanya kwekupedzisira (v)_t) = 2 x kumhanya kwekutanga = 2 x 1 = 2 m/s
Akabvunzwa: Kuedza = … ?
Mhinduro:
Simba rekutanga rekinetic:
EK yekutanga = ½ mv_o² = ½ (1)(1)² = ½ (1)(1) = ½ (1) = 0,5
Simba rekupedzisira rekinetic kana kumhanya kwechinhu kuri kaviri kumhanya kwacho kwekutanga:
EK yekupedzisira = ½ mv_t² = ½ (1)(2)² = ½ (4) = 2

Dzidziso yesimba rekushanda-kinetic:
Basa = Shanduko musimba rekinetic
Basa = Simba rekupedzisira rekinetic - Simba rekutanga rekinetic
Kuedza = 2 – 0,5
Kuedza = 1,5

Simba rekutanga rekinetic = 0,5
Kuedza = 3 x 0,5 = 1,5
Saka kuwedzera kumhanya kwechinhu kusvika kaviri kumhanya kwacho kwekutanga kunoda basa rakawanda simba rayo rekutanga rekinetic rakapetwa katatu.
Mhinduro chaiyo ndeiyi B.

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