本题目来源于试卷: Stationary wave on string，类别为 美国物理杯赛(Physics Bowl)
[单选题]
02.45: A light inextensible string is connected to a massx(80by*gci9dkrr -zby -a j y: M, that prova5nm/qtl7n 2cp3,v) j fkm )xeides the tension in the string. A lengt2vtfmmxce ,)jnp5n3/7 )alqk h L of the string has a fundamental frequency of vibration of $f_M$. If a second identical mass is now connected to the original mass, the new fundamental frequency of the string $f_{2M}$ of string length L in comparison to the fundamental frequency with only one mass connected $f_M$ is
A. $f_{2M}\:=2f_M$
B. $f_{2M}\:=\sqrt{2}f_M$
C. $f_{2M}\:=f_M$
D. $f_{2M}\:=\frac{1}{2}f_M$
E. $f_{2M}\:=\frac{1}{\sqrt{2}}f_M$
参考答案: B
本题详细解析:
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