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State which of the following situations are possible and give an example for each of these : <br> (a) An body with a constant acceleration but with zero velocity. <br> (b) An object moving with an acceleration but with uniform speed <br> (c) An object moving in a certain direction with an acceleration in the perpendicular direction.

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Solution :
(a) Possible <br> When a ball is thrown up at maximum height, it has zero velocity, although it will have constant acceleration due to gravity, which is equal to 9.8 m/`s^(2)`. <br> (b) Possible <br> When a car is moving in a circular track, its acceleration is perpendicular to its direction.

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