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)?  a. A negative value that does not change with time b. A gradually increasing negative value (straight line) c. An increasing rate of negative values over time (parabolic curve)  d. Zero at all times since the initial motion is horizontal

College Physics
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ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
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Chapter2: Kinematics
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Problem 36PE: An express train passes through a station. It enters with an initial velocity of 22.0 m/s and...
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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)? 

a. A negative value that does not change with time

b. A gradually increasing negative value (straight line)

c. An increasing rate of negative values over time (parabolic curve) 

d. Zero at all times since the initial motion is horizontal

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