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A ball rolls down an inclined plane, fig...

A ball rolls down an inclined plane, figure. The ball is first released from rest from `P` and then later from `Q`.
Which of the following statement is//are correct ?
.
(i) The ball takes twice as much time to roll from `Q` to `O` as it does to roll from `P` to `O`.
(ii) The acceleration of the ball at `Q` is twice as large as the acceleration at `P`.
(iii) The ball has twice as much `K.E` at `O` when rolling from `Q` as it does when rolling from `P`.

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