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範例:簡諧運動動力關係

一物體作簡諧運動(S.H.M),其位置與時間的關係為X(t)=2cos(2 t+/3)其中Xt的單位為公尺與秒,則下列敘述何者正確? (A)此簡諧運動的週期為2  (B)2秒末物體的位置在+1公尺  (C)2秒末物體的速度為-2公尺/ (D)物體最大加速度的量值為82公尺/2(E)若物體的質量為1公斤,則受力為=-82牛頓。[88北聯]


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