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Question
In an experiment, a student launches a ball with an initial horizontal velocity at an elevation 2 meters above ground. The ball follows a parabolic trajectory until it hits the ground. Which of the following accurately describes the graph of the ball's vertical acceleration versus time (taking the downward direction to be negative)?
  1. A negative value that does not change with time
  2. A gradually increasing negative value (straight line)
  3. An increasing rate of negative values over time
  4. (parabolic curve)
  5. Zero at all times since the initial motion is horizontal
Question by OpenStax is licensed under CC BY 4.0.
Final Answer
(a)
Solution Video

OpenStax College Physics Solution, Chapter 3, Problem 2 (Test Prep for AP® Courses) (1:52)

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