Engineering & Technology
Undergraduate
球在長度為1.8m的繩索末端以垂直圓圈逆時針旋轉。當球經過最低點後上升38.88度時，其總加速度為-22.5i+20.5j m/s^2。在那一瞬間
（1）徑向加速度大小為？
（2）球的速度為？
（3）總加速度大小為？
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