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JEE PHYSICS MCQ: OSCILLATIONS

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Out of the following functions representing motion of a particle which represents SHM (i)

y = \sin \omega t - \cos \omega t

(ii)

y = {\sin ^3}\omega t

(iii)

y = 5\cos \left( {\frac{{3\pi }}{4} - 3\omega t} \right)

(iv)

y = 1 + \omega t + {\omega ^2}{t^2}

View answer and explanation

Correct option: D

Only (i) and (iii)

Option D (Only (i) and (iii)) is correct because only these functions can be expressed in the form

A\sin(\omega t + \phi)

or

A\cos(\omega t + \phi)

.

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