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9. State which of the following situations are possible and give
an example for each of these:
(a) an object with a constant acceleration but with zero velocity
(b) an object moving in a certain direction with an acceleration
in the perpendicular direction.
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Answer:
(a) possible
Explanation:
when a ball is thrown vertically upwards,at the highest point ,its velocity is zero. But has a constant acceleration of 9.8 m/s square in the vertically downward direction
(b) possible
when a car is moving at a constant speed on a circular track, it has an acceleration perpendicular to its direction of motion (in radical direction)
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