Question

example of an object with constant accerlation but with zero velocity​

Answer 1

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.

Answer 2

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.