Kubad waa joomateri oo ay xaddido masaaxad ay dhammaan baraheedu u jiraan fogaan isl’eg bar cayiman ah oo loo yaqaan barta dhexe oo aan lahayn wax xagal ah.
Kubad Bedka xaddidan:
A
=
4
π
r
2
{\displaystyle A=4\pi r^{2}\,}
Mugga :
V
=
4
π
r
3
3
{\displaystyle V={\frac {4\pi r^{3}}{3}}}
Kubad la dhex-dhigay Dhululubo. Qaacidada
Habka Kubadda
Wareeg
U
=
2
π
r
=
d
A
P
F
d
r
{\displaystyle U\,=\,2\pi r{\color {OliveGreen}\ ={\frac {\mathrm {d} A_{\mathrm {PF} }}{\mathrm {d} r}}}}
Baaxad
A
O
=
4
π
r
2
=
d
V
d
r
{\displaystyle A_{O}\,=\,4\pi r^{2}\,{\color {OliveGreen}\ ={\frac {\mathrm {d} V}{\mathrm {d} r}}}}
Mug
V
=
4
3
π
r
3
=
∫
0
r
A
O
d
r
{\displaystyle V\,=\,{\frac {4}{3}}\pi r^{3}=\int _{0}^{r}A_{O}\mathrm {d} r}
Bedka Goobada
A
P
F
=
π
r
2
=
∫
0
r
U
d
r
{\displaystyle A_{\mathrm {PF} }\,=\,\pi r^{2}=\int _{0}^{r}U\mathrm {d} r}
Mugga Kubadda
V
K
S
=
h
2
π
3
(
3
r
−
h
)
{\displaystyle V_{\mathrm {KS} }\,=\,{\frac {h^{2}\pi }{3}}(3r-h)}
Meelaha ay ka daboolantahay
A
K
K
=
2
r
h
π
=
2
r
2
π
(
1
−
cos
α
2
)
{\displaystyle A_{\mathrm {KK} }\,=\,2rh\pi =2r^{2}\pi \left(1-\cos {\frac {\alpha }{2}}\right)}
Waqtiga ay negaato
J
=
2
5
m
r
2
{\displaystyle J\,=\,{\frac {2}{5}}mr^{2}}
