【用戶】【站僕】摩檸Morning
【年級】小一下
【評論內容】原本題目:14. When the position of an oscillating particle is, its velocity v is(A)A cos t(B)-A cos t(C)-A sin t(D)A sin t修改成為14. When the position of an oscillating particle is x = Acoswt ,, its velocity v is(A)A cos wt(B)-A cos wt(C)-Aw sin wt(D)Aw sin wt