د. شرى الدغفق1
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-
1 .
-
, - m
.
xk-=F:
. k
am=F
:
2 .
-
:
: ,
:
:
, ,
:
:
3 .
-
, ) (
:
4 .
-
: K
:
: E
5 .
-
. ) (
:, A = x
: , 0=EP , 0=x
:
:
6 .
-
,
7 .
-
. 0=t, A=x -
t soc A=x
8 .
-
m/N 0.02 gk 05.0
mc 0.3 . )a(
:
31.22
0=U 0=x
9 .
-
mc 0.2 )b(
:
:
.
01 .
-
.mc 0.2 )c(
:
b
E = U + K
11 .
-
. m/N 5=k g 002 , mc 5
.
:
. )a(
21 .
-
)b(
:
)c(
:
. )d(
:
31 .
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