1.

The instantaneous displacement of a simple pendulum oscillator is given by \[x=A\cos \left( \omega t+\frac{\pi }{4} \right)\]. Its speed will be maximum at time                                                        [CPMT 2000]

A. \[\frac{\pi }{4\omega }\]
B. \[\frac{\pi }{2\omega }\]
C. \[\frac{\pi }{\omega }\]
D. \[\frac{2\pi }{\omega }\]
Answer» B. \[\frac{\pi }{2\omega }\]


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