question_answer

The displacement of a particle moving in S.H.M. at any instant is given by\[y=a\sin \omega t\]. The acceleration after time \[t=\frac{T}{4}\] is (where T is the time period) [MP PET 1984]

A)            \[a\omega \]                       

B)            \[-a\omega \]

C)            \[a{{\omega }^{2}}\]

D)            \[-a{{\omega }^{2}}\]