,第四章曲线运动万有引力与航天,第3节圆周运动,2,3,相等,4,不变,圆心,不变,速度,5,快慢,6,转动快慢,7,一周,圈数,8,快慢,9,方向,大小,10,圆心,合力,分力,11,突然消失,不足以,逐渐远离,12,匀速圆周,切线,远离,靠近,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,Thank you for watching !,