A) five
B) four
C) three
D) two
Correct Answer: C
Solution :
Equation gives executing periodic motion is \[y=4{{\cos }^{2}}\left( \frac{t}{2} \right)\sin \,(1000\,t)\] or \[y=2\cos \left( \frac{t}{2} \right)\sin \left[ \left( 1000t+\frac{t}{2} \right) \right.\] \[\left. -\,\sin \left( 1000t-\frac{t}{2} \right) \right]\] It is superposition of three independent harmonic motion.You need to login to perform this action.
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