шпора по физике за первый семестр / ускорение

яю #A:>@5=85 ?>:07K205B A:>@>ABL 87<5=5=8O A:>@>AB8. a ( A@54=55 ) = delta v / delta t. (@8AC=>:  B>G:0 =0 ?>;C>:@C6=>AB8, >B =55 2 25:B>@0 A:>@>AB8, 225@E 8 2?@02>, 8E A>548=O5B delta v, 24>;L =55 CE>48B 2 =5:C40 25:B>@ A@54=53> CA:>@5=8O). 3=>25==>5 CA:>@5=85  a = lim (delta t ар 0) delta v / delta t = dv / dt = v  (t). 0?@02;5=85 25:B>@0 CA:>@5=8O A>AB02;O5B =5:>B>@K9 C3>; A 25:B>@>< A:>@>AB8. #3>; ,$ <564C 25:B>@0<8 A:>@>AB8 8 CA:>@5=8O <>65B 87<5=OBLAO 2 ?@545;0E 0 <= ,$ <= . #3;K ,$=0 8 ,$= A>>B25BAB2CNB ?@O<>;8=59=><C 42865=8N. @8 0 <= ,$ <= /2 <>4C;L A:>@>AB8 2>7@0AB05B, ?@8 /2 < ,$ <=  <>4C;L A:>@>AB8 C1K205B. @8 ,$ = /2 <>4C;L A:>@>AB8 =5 87<5=O5BAO.

5:B>@ CA:>@5=8O ,$ ?@8 :@82>;8=59=>< 42865=88 B5;0 >1KG=> ?@54AB02;ONB 2 2845 AC<<K 42CE A>AB02;ONI8E, =0?@02;5==KE A;54CNI8< >1@07><: >4=0 ?> :0A0B5;L=>9 : B@05:B>@88  MB> B0=35=A0;L=>5 CA:>@5=85, 2B>@0O ?> =>@<0;8 : :0A0B5;L=>9  =>@<0;L=>5 CA:>@5=85.

a (=>@<0;L=>5) = v (AB.2) / R //// a (B0=35=A0;L=>5) = dv / dt ///// | a | = (:>@5=L) a B0=35=A0;L=>5 (AB.2) + a =>@<0;L=>5 AB.2.