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For a particle acceleration is defined as `veca=(-5xhati)/(|xx|)` for `X ne 0 "and" veca =0 "for" X=0`. If the particle is initially at rest `(a,0)` what is period of of motion of the particle.
A. `4sqrt(2a//5)sec.`
B. `8sqrt(2(a//5))sec.`
C. `2sqrt(2a//5) sec.`
D. cannot be determined

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