question_answer

Masses m and 3m are attached to the two ends of a spring of spring constant k. The period of oscillation is ____.   

A) \[2\pi \sqrt{k/m}\]                      

B) \[4\pi \sqrt{m/k}\]

C) \[\pi \sqrt{3m/k}\]                      

D) \[\pi \sqrt{3m/2k}\]