Two particles start simultaneously from the same point and move along two straight lines, one with uniform velocity $v$ and other with a uniform acceleration $a.$ If $\alpha$ is the angle between the lines of motion of two particles then the least value of relative velocity will be at time given by

  • A

    $(v/a)\,\, sin \,\,\alpha$

  • B

    $(v/a)\,\, cos \,\,\alpha$

  • C

    $(v/a)\,\, tan \,\,\alpha$

  • D

    $(v/a)\,\,cot \,\,\alpha$

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