question_answer

The potential energy of a particle of mass 1 kg in motion along the x-axis is given by U=4(1-cos2x) Here x is in meter. The period of small oscillations (in sec), is________. 

A) \[2\pi \]                         

B) \[\pi \]

C) \[\pi /2\]                        

D) \[\sqrt{2}\pi \]