試卷名稱:107年 - 台聯大轉學考 普通物理#99865
年份:107年
科目:轉學考-物理
4. Consider a small segment of a string which is under tension T. The mass density of the string is A and the length of this segment is do. Let the vertical displacement bf the string be y(x,t) and 8y/Ox be small everywhere. The vertical force acting on this segnent is
(A)
(B)
(C)
(D)
(E) none of the above.