只要是圆周运动才有向心力吗
\u5706\u5468\u8fd0\u52a8 \u5411\u5fc3\u529b\u5411\u5fc3\u529b\u7b49\u4e8e\u8d28\u91cf\u4e58\u4ee5\u901f\u5ea6\u7684\u5e73\u65b9\u6bd4\u4e0a\u534a\u5f84 \u5c31\u662f 0.5kg*2m/s*2m/s\u5904\u4ee51m \u5c31\u662f2N \u4e5f\u5c31\u662f\u8bf4 \u6746\u7ed9\u7403\u7684\u529b\u662f\u652f\u6491\u529b \u5c31\u5e94\u8be5\u662f \u7403\u53d7\u91cd\u529b5N-2N=3N \u5b8c\u6bd5
\u6746\u53d7\u538b\u529b 3N
是
不要
绛旓細涓嶆槸銆備絾涓瀹氭槸瀵瑰簲鍦嗗懆杩愬姩鐨勬煇涓浣嶇疆銆
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