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[" A particle is moving in the "X" -Y pl...

[" A particle is moving in the "X" -Y plane.At time "],[t=0" it is located at the origin "O(0,0)" and has "],[" the velocity "v_(0)=a(sqrt(3)hat i+hat j)," where a "],[" is a positive constant and "hat i,hat j" are unit "],[" vectors in the positive "x" and positive "y-],[" directions.Its acceleration is constant and is "],[" given by "vec f=-(i+hat j)" .In its subsequent "],[" motion "(t>0)" it will cross the "x" -axis at the "],[" instant of time given by: "]

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