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已知質點甲和質點乙的角速度比為3:1. 所以它們的週期比為1:3. 線速度=2x3.14xR/t,線速度比=(R1xt2)/(R2xt1)=2:3 計算得它們的半徑比(R1:R2)=(2/3)x(t1/t2)=2:9
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