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[" 7.The motion of a particle along a st...

[" 7.The motion of a particle along a straight line is "],[" described by equation "],[qquad x=8+12t-t^(3)],[" where,"x" is in metre and "t" in sec.The retardation of "],[" the particle when its velocity becomes zero,is "],[[" (a) "24ms^(-2)," (b) zero "," (c) "6ms^(-2)," [C] "12ms^(-2)]]

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