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The motion of a particle along a straigh...

The motion of a particle along a straight line is described by equation
`x = 8+12t - t^(3)`
where, x is in meter and t in sec. The retardation of the particle when its velocity becomes zero, is

A

`6ms^(-2)`

B

`12ms^(-2)`

C

`24ms^(-2)`

D

Zero

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The correct Answer is:
B
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