Short Answer
3.1 Acceleration
True or Falseâ€”The vector for a negative acceleration points in the opposite direction when compared to the vector for a positive acceleration.
 True
 False

â€“5 m/s

â€“1 m/s

1 m/s

5 m/s
How is the vector arrow representing an acceleration of magnitude 3 m/s^{2} different from the vector arrow representing a negative acceleration of magnitude 3 m/s^{2}?
 They point in the same direction.
 They are perpendicular, forming a 90Â° angle between each other.
 They point in opposite directions.
 They are perpendicular, forming a 270Â° angle between each other.
How long does it take to accelerate from 8.0 m/s to 20.0 m/s at a rate of acceleration of 3.0 m/s^{2}?
 0.25 s
 4.0 s
 9.33 s
 36 s
3.2 Representing Acceleration with Equations and Graphs
If a plot of displacement versus time is linear, what can be said about the acceleration?
 Acceleration is 0.
 Acceleration is a nonzero constant.
 Acceleration is positive.
 Acceleration is negative.
True or False: â€”The image shows a velocity vs. time graph for a jet car. If you take the slope at any point on the graph, the jet carâ€™s acceleration will be 5.0 m/s^{2}.
 True
 False
When plotted on the blank plots, which answer choice would show the motion of an object that has uniformly accelerated from 2 m/s to 8 m/s in 3 s?
 The plot on the left shows a line from (0,2) to (3,8) while the plot on the right shows a line from (0,2) to (3,2).
 The plot on the left shows a line from (0,2) to (3,8) while the plot on the right shows a line from (0,3) to (3,3).
 The plot on the left shows a line from (0,8) to (3,2) while the plot on the right shows a line from (0,2) to (3,2).
 The plot on the left shows a line from (0,8) to (3,2) while the plot on the right shows a line from (0,3) to (3,3).
When is a plot of velocity versus time a straight line and when is it a curved line?
 It is a straight line when acceleration is changing and is a curved line when acceleration is constant.
 It is a straight line when acceleration is constant and is a curved line when acceleration is changing.
 It is a straight line when velocity is constant and is a curved line when velocity is changing.
 It is a straight line when velocity is changing and is a curved line when velocity is constant.