A) 0
B) 0.5a
C) 1.5a
D) 2a
Correct Answer: D
Solution :
[d] Initially t=0 \[x=a\,\cos \,\pi t=-a\,\cos \,{{0}^{o}}=a\] Finally at \[t=3\] \[x=a\,\cos \,3\pi =-3a\] Total displacement = 2a
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