A particle is moving along the locus: \( y=k \bigvee x(k0) \) with a constant speed \( v \) . A...

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A particle is moving along the locus: \( y=k \bigvee x(k0) \) with a constant speed \( v \) . At \( t=0 \), it is at the origin and about to enter the first quadrant of \( x-y \) axes. At some later time \( t0 \), \( v_{x}=v_{y} \). At this moment, \( \left[a_{y}-a_{x}\right]= \)
(a) \( v^{2} / k^{2} \)
(b) Zero
(c) \( -v^{2} / k^{2} \)
(d) None of these
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