Answer :
The acceleration of the ball when it is moving up, at the highest point and when moving down is always constant and in downward direction.
When a ball is thrown upward, its acceleration is always constant.
When a ball is thrown, it is under the influence of gravity, the acceleration working on the ball is due to earth.
The acceleration given by the earth is called Acceleration due to gravity. When the ball is going upward. The acceleration is opposite to the motion of the ball. When the ball is moving downwards, the acceleration is in the direction of the motion of the ball.
When the ball is at highest point, the acceleration is still downwards.
Throughout the motion, the acceleration is constant in terms of direction as well as magnitude.
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