Newton
.
2
1
, :
, 2
:
.
1
F= 0. .
.
x, 2
1 Newton
,
,
2
:
=
,
O
x
,
2
x .
, ,
1 2
0
Newton
.
. ,
Fx =0.
, Fx
.
1
Newton Fx = m路a. 2
1
N
m=2 Kg =300.
F=10 N
T
=0,5. 2
: g=10 m/s ,
1.
3.
x
. ,
= 10· 0,8 =
4. F +
5.
- w = 0
2
1
= 10· 0,6=
Newton:
= w – F = m·g – F = 2·10 - 8 = 12N :
x
:
F =· ,
F= 0
x
T.
F, Fx = F·
6.
=0,8.
: F, w, N
,
2.
=0,6
F Fx
w
t=5 s.
Fy
=
= 0,5·12 =
.
u0=10m/s
u
u0
)
: 3
Fx = Fx – T = 8 – 6 =
(
x. Fx = m·
0)
: = 1m/s2
2 = 2·
7.
.
= x=
2
+ ·
= +
+
· =
=
+
=
·
+ ·
·
:
/ =
+ ·
=
+
,
=
,
N
)
T m=10 Kg
wx
=300. =0,2.
w
; ,
x= 320m, g=10 m/s2,
:
=0,8
wy
x
.
=0,6.
.
Wx > T.
.
: .
4
1.
: w, N
, x
.
w,
3.
,
wx = w·
2
=10·10· 0,8 = 80
= m·g·
4.
w = w·
1 F = 0
w -
= 0
= 0,2·60 = 12 :
Fx = wx – T = 80 – 12 = 68
Fx = m·
=
: wx > T
x.
(
0)
: = 6,8m/s2
68 = 10·
7.
. x=
·
·
= · ,
= 10· 10· 0,6= 60
= w = 60N :
x
= m·g·
Newton:
5. 6.
:
·
=
= ,
· = ,
·
·
:
=
=
/
= .
2.
T.
5
.
. .
,
,
. .
.. .
1
.
Newton
6