1.

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 periodic but not simple harmonic motion with a period \[2\pi /\omega \]
D. \[-a{{\omega }^{2}}\]
Answer» E.


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