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Choose the correct options for uniformly accelerated motion along a straight line

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If $\hat{r} . \hat{v} < 0$ then object is moving towards origin

If $\hat{r} . \hat{v} < 0$ then object is moving away from origin

If $\hat{a} . \hat{v} = 1,$ then object is moving with increasing speed without change in direction

If $\hat{a} . \hat{v} = - 1,$ then object definitely changes its direction

answer is A, B, C.

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Detailed Solution

$When \hat{a} and \hat{v} are in the same direction, speed is increasing$

When $\hat{a}$ and $\hat{v}$ are in opposite directions, speed is decreasing

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