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The motion of a particle along a straight line is described by equation: x=8+12t-t where x is in metre and t in second. The

The motion of a particle along a straight line is described by equation: x=8+12t-t where x is in metre and t in second. The retardation of the particle when its velocity becomes zero, is : (b) zero (a) 24 ms 6 ms (c) (d) 12 ms

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