一个人用木杆甩物体做竖直平面的圆�运动当物体处于最高点时,杆的质量忽略,人受到物体由于重力的压力吗 知乎 Template




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tomski一个人用木杆甩物体做竖直平面的圆�运动当物体处于最高点时,杆的质量忽略,人受到物体由于重力的压力吗 知乎 coloring