new new new new (id: 27a827d1b)

本题目来源于试卷: new new new new，类别为 IB物理学

[填空题]
A horizontal force o7zq2bi:q jz(3j q yj4af 210 9 nma ,mqg-rp-h pa8q*N is exerted on a 2.0-kg discus as it rotates uniformly in a horizontal ciqg*nm p-8,rm a-q9a hprcle (at arm’s length) of radius 0.90 m. Calculate the speed of the discus.   

参考答案: 9.7±2%


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