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

??????? ?? ??????? ???? ???. ??? ??????? ?????? ??? ????????? ??????? ???? ???????? ????? ??????.??? ????? ?? ????? ?????? «????? ?? ????? ??????»?: a t = v ? displaystyle a_ t = dot v ??? ???? ??????? ?? ?????? ???? ??? ????? ???? ?????? ??? ???? ???? ????? ???? ????? ??? ??? ?????? ???? ??? ????? ??? ????????? ????? ???? ???? ??? ????? ??? ????

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

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

- ???????? ???? ????? ??? ????? ????? ? ????? ??????? ?? ??? ????? ?? ????? ???? ?? ?? ??? ?????.??????? ??????? ??? ?????? ????? ???? ?? ?????? ??????? ?????? ??????? ???????.??? ??? ????? ?????? ?? ???????? ???????? ??? ????? ????? ???? ???? ?????????? ?????? ??? ??? ???? ?? ???? ????? ?????? ?? ???? ??? ?????? ??????? ????? ?? ???? ????? ??????