, . , , .
, . . , . t. Δ t , , . Δ (.1.4).
t t + Δ t , Δ Δ t:
.
() , .
. (1.6)
- (/2). Δ . (.1.4) , . , , Δ , Δ t. Δ Δ t .
a τ = , (1.7)
.. , . . , , Δ s r, . EAD Δ u n /AB = υ 1 /r, AB = u Δ t,
.
Δ t υ 1 u. EAD , EAD , ADE Δ . , Δ t Δ . , , . ,
an = , (1.8)
( ).
(.1.5):
= = .
, ( ), - ( ).
:
1) τ = 0, n = 0 ;
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2) τ = a = const, n = 0 - .
υ= υ 0 + at,
s = υ 0 t + at 2/2.
3) τ = f (t), n = 0 ;
4) aτ = 0, n = const. n = 0 , . n = υ 2 /r , . ;
5) τ = 0, n ≠ 0 ;
6) τ = const, n ≠ 0 ;
7) aτ = f (t), n ≠ 0 .