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A particle moving along the x axis has a...

A particle moving along the `x` axis has a position given by `x=54 t - 2.0 t^(3) m`. At the time `t=3.0s`, the speed of the particle is zero. Which statement is correct ?

A

`4.3xx10^(4) m//s^(2)`, south

B

`9.4 xx10^(4)m//s^(2)`, north

C

`5.1xx10^(4)m//s^(2)`, north

D

`2.2 xx 10^(3) m//s^(2)`, south

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The correct Answer is:
D
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