天美影院

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F = kx,

F ?? ????? ???? ????? ??? ??????? ?? ????? ???, k ?? ???? ???????? ? x ?? ???????.

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???? ???? ??????? ?? ??????? ?? ???? ??????? (k) ????? ??????? ???? ??????? ???? ????? ?????.

????? ????? ?????

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?=(?_o-D_i)/2,

?=(?_o+D_i)/2

?? ??? ?????????? ???? ddd ??? ????? ?????????? (??)? ?DDiDiDi ?? ????? ??????? ??????? (??)? ?DDoDoDo ?? ????? ??????? (??)? ?DDDDD ???? ??? ????? ??????? (??).

???? ?????? (?)

???? ??????? (C) ?? ???? ????? ??? ????? ??? ??? ????? ????? ????? ?????? ?? ?? ?? ?????? ????? ??????? ??????. ???? ???? ???? ?? ????? ????? ???? ?????? ?????? ??? 4 ?12? ???? ?????? ?? ??????? ?????? ?? 6 ??? 9 ???????? ??????? ??????? ??? ???? ??????? ?????? ??? ??????? ????????. ????? ?????? ??????? ???????? (???? ???? ??? ????? ???? ???????) ??? ????? ???? ?????? ???? ??????? ???? ?????. ???? ?????? ?? ???? ??? ???????? ?????? ???? ?????? ???? ?????? ??? ????? ?? ?? ??? ???? ?? ???? ??? ????? ??? ??? ????????? ????????? ??? ?????.

?=?/?/?

??? C = ???? ??????? [???? ????]

?????? ??????? (?)

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?=(?_f-3?)/?_a

???? p = ??? ??????? [??]? L_f = ????? ???? [??]? ? = ??? ????? [??] ?N_a = ??? ??????? ??????

???? ????

??? ???????? ?? ????? ????? ??? ????? ?????? ?? ???? ????? ???? ????? ????? ??? ??????? ???? ??. ?????? ??? ??? ??????? ??????? ????????? ?? ???? ?????? ??????.

?= ??/8?³N_a

??? k = ???? ??????? [?????/??] ? G = ????? ???? ?????? ???? ????? [?????/??²].

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