問題詳情

4. Consider a small segment of a string which is under tension T. The mass density of thestring is A and the length of this segment is do. Let the vertical displacement bf the stringbe 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.

參考答案

答案：D
難度：計算中-1
書單：沒有書單，新增