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1
ʳ
1. - :
, , ( x,y,z);
x, y, z .
ʳ
,
t .
2.
∆ ∆ t.
∆s:
∆s , ∆ t.
υ .
3.
ax, ay, az a
,
an aτ .
,
R .
4. ʳ x
x0 .
υ= const, a = 0.
5. ʳ (a = const) x
υ0 .
6. - . ʳ
φ ( ).
7.
Δφ Δ t.
|
|
8.
9. ʳ
ω= const, = 0.
N , t;
( ).
10. ʳ ( = const)
11. , , :
) R ( );
)
.
:
)
;
)
.
1. г = A + Bt + Ct3, A = 2 ; = 1 /; = - 0,5 /3. 2.
:
x = A + Bt + Ct3
A = 2
= 1 /
= - 0,5 /3
t = 2 c
__________
x ? ? a ?
. , , , t:
x = (2+1×2 - 0,5×23) = 0.
(t = 2 c), , x .
x = = B + 3Ct2 .
, ,
ax = = 6Ct.
t = 2 c,
x = (1 - 3 × 0,5 × 22) / = - 5 /,
x = 6 (- 0,5) × 2 /2 = - 6 /2.
2. 0,1 , , 0,5/2. , .
:
R = 0,1
w(0) = 0
b = 0,5 /2
t = 2
_________ ______
t ? an ? a ?
. , ,
at = R, (1)
an = w2R, (2)
;
;
R .
,
b = . (3)
, t
w = w(0) + b t, (4)
w(0) = 0.
(2) (4),
an = w2 R = b2 t2 R.
t = 2
an = b2 t2 R = 0,52×22×0,12 = 0,1 /2,
t = bR = 0,5×0,1 = 0,05 /2,
=