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A point moving along the x- direction st...

A point moving along the `x`- direction starts from rest at `x=0` and comes to rest at `x=1` after 1 s. Its acceleration at any point is denoted by `alpha` . Which of the following is not correct ?

A

`alpha` must change sign during the motion.

B

`|alpha| ge 4` units at some or all points during the motion.

C

It is not possible to specify an upper limit for `|alpha|` from the given data.

D

`|alpha|` cannot be less than 1/2 during the motion.

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The correct Answer is:
D
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