Question

an object with a constant acceleration but with zero velocity ​

Answer 1

Explanation:

A) when a ball is thrown upward and it reaches at its maximum height and falls down.

b) when an object is moving on a circular path.

a) acceleration refers to the rate of change in velocity per unit time, inspite of that constant acceleration with zero velocity is impossible. When an object is thrown in upward direction, at the maximum height the velocity of the object becomes zero but still in that condition a constant acceleration due to gravity is working.

(b) Object moving in a certain direction with an acceleration in perpendicular direction is possible. When an object moves on a circular path, its direction is along the tangent of the circle but acceleration is towards the radius of the circle. We know, that a tangent always makes a right angle with the radius; so when an object is in circular motion, the acceleration and velocity are in mutually perpendicular direction.

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SMALL DETAIL

When an object is thrown in upward direction, at the maximum height the velocity of the object becomes zero but still in that condition a constant acceleration due to gravity is working. (b) Object moving in a certain direction with an acceleration in perpendicular direction is possible; in case of circular motion.

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