圆周运动的向心力,是变的还是不变的?和什么有关? 物体做匀速圆周运动,向心力变不变
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是变的,方向时刻在变。如果是匀速圆周运动,向心力大小不变,如是非匀速圆周运动,向心力大小也要变,但不管是什么圆周运动,向心力方向一定是变的 ,所以向心力是变力绛旓細鏄彉鐨锛屾柟鍚戞椂鍒诲湪鍙樸傚鏋滄槸鍖閫熷渾鍛ㄨ繍鍔紝鍚戝績鍔涘ぇ灏忎笉鍙橈紝濡傛槸闈炲寑閫熷渾鍛ㄨ繍鍔紝鍚戝績鍔涘ぇ灏忎篃瑕佸彉锛屼絾涓嶇鏄粈涔堝渾鍛ㄨ繍鍔紝鍚戝績鍔涙柟鍚戜竴瀹氭槸鍙樼殑 锛屾墍浠ュ悜蹇冨姏鏄彉鍔
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