[Æ´Òô]£ºdian de yundong fangcheng
[ÍâÎÄ]£ºkinematic equations of a moving particle
¶ÔµãÔ˶¯¹ý³ÌµÄÊýѧÃèÊö£¬ËüÄܸø³öÈκÎ˲ʱt¶¯µãËùÔڵĿռäλÖᣵãµÄÔ˶¯·½³Ì¿ÉÓö¯µãµÄʸ¾¶ r×÷Ϊʱ¼ätµÄº¯ÊýÀ´±íʾ£º
r£½r(t)£½x(t)i£«y(t)j£«z(t)k£¬Ê½ÖеÄx(t)¡¢y(t)¡¢z(t)Ϊʸ¾¶ÔÚÈý¸öÖ±½Ç×ø±êÖáÉϵÄͶӰ¡£ÒÑÖªx(t)¡¢y(t)ºÍz(t)£¬¾ÍºÜÈÝÒ×Çó³öµãÔÚÈκÎ˲ʱµÄËٶȺͼÓËÙ¶È¡£
µãµÄÆ½ÃæÔ˶¯·½³ÌÔÚÖ±½Ç×ø±êÖÐΪx=x(t)£¬y=y(t)£»ÔÚ¼«×ø±êÖÐΪr=r(t)£¬¦È=¦È(t)¡£¶Ô´ú±íÕæÊµÎïÌåµÄÖʵ㣬ÉÏÊöº¯Êý¾ùΪʱ¼äµÄµ¥ÖµÁ¬Ðøº¯Êý¡£



