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Which of the following statements is true for a ball thrown vertically upward?
A. The ball has a negative acceleration on the way up and a positive acceleration on the way down.
B. The ball has a positive acceleration on the way up and a negative acceleration on the way down.
C. The ball has zero acceleration on the way up and a positive acceleration on the way down.
D. The ball has a constant acceleration throughout its flight.

Respuesta :

Answer:

A. The ball has a negative acceleration on the way up and a positive acceleration on the way down.

Explanation:

  • When a ball is thrown up vertically then the acceleration due to gravity always acts in a direction towards the center of the earth. So here when an object is thrown vertically upwards then the acceleration due to gravity acting in a downward direction which is opposite to the direction of motion of the object hence taken as negative with respect to the displacement.
  • When the ball reaches at the top height its speed becomes zero and then it returns back towards the earth. While coming down the direction of the object's displacement is same as the direction of acceleration due to gravity.

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