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[" A particle is moving in a straight li...

[" A particle is moving in a straight line and passes through a point "0" with a "],[" velocity of "6ms^(-1)" .The particle moves with a constant retardation of "2ms^(-2)" for "],[4s" and there after moves with constant velocity.How long after leaving "O],[" does the particle return to "O],[[" A."3s," B."8s," C.Never "," D."4s]]

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