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Ders: Mexaniki Enerji
Müəllim: Rəsmiyyə
Ömərova
Sinif: VII

www.fizikpenceresi.com
Səhv etmək insanlar üçündür;
ancaq tabaşiriniz qələminizdən əvvəl bitirsə,
deməli,çox səhvə yol verirsiniz
J. Jenkins
Enerji; İş görə bilmək bacarığıdır

MEXANİKi ENERJİ

KİNETİK ENERJİ

POTENSİAL ENERJİ

Mekaniki enerji kinetik enerjiyle potensial enerjinin cəminə bərabərdir .

Emexaniki = Ek + Ep
Kinetik Enerji
Kinetik Enerji
Cismin hareketi zamanı ortaya çıxan enerjiyə deyilir.

KİNETİK ENERJİ

Öteleme Kinetik Enerji

Dönme Kinetik Enerji

EKinetik = Eöteleme + Edönme

1
1 2
2
E k = mv  Iω
2
2
Sürüşmə Kinetik Enerjisi
Sürüşmə Kinetik Enerjisi
Cismin müəyyən v sürətiləbir düz xətt üzrə hərəkəti zamanı yaranır.

1 2
Ek = mv
2


v1 = 0


v2 = v


F
x


F
Nümunə
Nümunə
Bir futbolçunun yanından 5 m/san sürətlə keçən 400 q kütləli topa vuraraq topun
sürətiniı 20 m/san’ yə çıxardır. Futbolcunun gördüyü iş J- dür?

İzah:

1
2
2
W = m(v2 − v1 )
2
1
W = 0,4(20 2 − 52 )
2
W = 75 J
Fırlanma Kinetik Enerjisi
Fırlanma Kinetik Enerjisi
Dairəvi cismin öz oxu ətrafında fırlanmasından yaranır .

Ek =

r
O

v

1 2
Iω
2

Xətti sürət : Cismin çevrə boyunca qət
etdiyi məsafənin radiusa nisbətidir

x
v=
t

2π .r
v=
T

Bucaq sürəti :Cismin çevrə boyunca vahid zamanda çevrə
boyunca açdığı bucaqdır .

θ
ω=
t

2π
ω=
T

v = ω.r
m

v

Cisim sürtünərək hərəkət edirsə, kinetik enerjisi:

Cisim dönərək hərəkət edirsə, kinetik enerjisi :

1 2
Ek = mv
2
1 2 1 2
Ek = mv + Iω
2
2
NÜMUNƏ
NÜMUNƏ
Radiusu 15sm, kütləsi 400 q olan kürə öz oxu ətrafında 5 rad/san bucaq
sürıtilə fırlanır. Kürənin əmələ gətirdiyi diyirlənmə enerjisini tapın ( Ik =
(2/5)mr2 )

Çözüm:

1
E = .I .ω 2
2
1 2
E = .( .mr 2 )ω 2
2 5
1 2
E = .( .0,4(0,15) 2 .52
2 5
E = 0,045 J
Sevgili Öğretmen ve Öğrenciler,
Bu sunu, 11.sınıflara yönelik olup müfredata
tam uyumlu olarak hazırlanmıştır.

Sununun aslı 61 sayfadan oluşmaktadır.

Sunuların tamamına ulaşabilmeniz için
www.fizikpenceresi.com
adresini tıklamalısınız.

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Maxaniki enerji (1)

  • 1. Ders: Mexaniki Enerji Müəllim: Rəsmiyyə Ömərova Sinif: VII www.fizikpenceresi.com
  • 2. Səhv etmək insanlar üçündür; ancaq tabaşiriniz qələminizdən əvvəl bitirsə, deməli,çox səhvə yol verirsiniz J. Jenkins
  • 3. Enerji; İş görə bilmək bacarığıdır MEXANİKi ENERJİ KİNETİK ENERJİ POTENSİAL ENERJİ Mekaniki enerji kinetik enerjiyle potensial enerjinin cəminə bərabərdir . Emexaniki = Ek + Ep
  • 4. Kinetik Enerji Kinetik Enerji Cismin hareketi zamanı ortaya çıxan enerjiyə deyilir. KİNETİK ENERJİ Öteleme Kinetik Enerji Dönme Kinetik Enerji EKinetik = Eöteleme + Edönme 1 1 2 2 E k = mv  Iω 2 2
  • 5. Sürüşmə Kinetik Enerjisi Sürüşmə Kinetik Enerjisi Cismin müəyyən v sürətiləbir düz xətt üzrə hərəkəti zamanı yaranır. 1 2 Ek = mv 2  v1 = 0  v2 = v  F x  F
  • 6. Nümunə Nümunə Bir futbolçunun yanından 5 m/san sürətlə keçən 400 q kütləli topa vuraraq topun sürətiniı 20 m/san’ yə çıxardır. Futbolcunun gördüyü iş J- dür? İzah: 1 2 2 W = m(v2 − v1 ) 2 1 W = 0,4(20 2 − 52 ) 2 W = 75 J
  • 7. Fırlanma Kinetik Enerjisi Fırlanma Kinetik Enerjisi Dairəvi cismin öz oxu ətrafında fırlanmasından yaranır . Ek = r O v 1 2 Iω 2 Xətti sürət : Cismin çevrə boyunca qət etdiyi məsafənin radiusa nisbətidir x v= t 2π .r v= T Bucaq sürəti :Cismin çevrə boyunca vahid zamanda çevrə boyunca açdığı bucaqdır . θ ω= t 2π ω= T v = ω.r
  • 8. m v Cisim sürtünərək hərəkət edirsə, kinetik enerjisi: Cisim dönərək hərəkət edirsə, kinetik enerjisi : 1 2 Ek = mv 2 1 2 1 2 Ek = mv + Iω 2 2
  • 9. NÜMUNƏ NÜMUNƏ Radiusu 15sm, kütləsi 400 q olan kürə öz oxu ətrafında 5 rad/san bucaq sürıtilə fırlanır. Kürənin əmələ gətirdiyi diyirlənmə enerjisini tapın ( Ik = (2/5)mr2 ) Çözüm: 1 E = .I .ω 2 2 1 2 E = .( .mr 2 )ω 2 2 5 1 2 E = .( .0,4(0,15) 2 .52 2 5 E = 0,045 J
  • 10. Sevgili Öğretmen ve Öğrenciler, Bu sunu, 11.sınıflara yönelik olup müfredata tam uyumlu olarak hazırlanmıştır. Sununun aslı 61 sayfadan oluşmaktadır. Sunuların tamamına ulaşabilmeniz için www.fizikpenceresi.com adresini tıklamalısınız.