10
practice testMultiple Choice

Practice Test

Question 10 • Physics

Which graph shows an object with constant acceleration?

Answer
A
Image with description A graph titled Velocity versus Time shows time in seconds on the x axis, numbered 0 to 5, and velocity in meters per second on the y axis, numbered 0 to 10. A line starts at (0, 10) and ends at (5, 0).
B
Image with description A graph titled Velocity versus Time shows time in seconds on the x axis, numbered 0 to 10, and velocity in meters per second on the y axis, numbered 0 to 50. A line starts at the origin and goes to (4, 40), then a line from (4, 40) to (9, 40) and a line from (9, 40) to (10, 0).
C
Image with description A graph titled Velocity versus Time shows time in seconds on the x axis, numbered 0 to 5, velocity in meters per second on the y axis, numbered 0 to 35. A curved line starts at the origin and arcs up to (4.3, 35).
D
Image with description A graph titled Velocity versus Time shows time in seconds on the x axis, numbered 0 to 5, and velocity in meters per second on the y axis, numbered 0 to 5. A line starts from (0, 5) continues to (2, 2.5) to (4, 2.5) and ends at (5, 5).

Explanation

On a velocity-versus-time graph, acceleration is the slope. In choice A, velocity changes along one straight line, from 10 m/s at 0 s to 0 m/s at 5 s, so its slope—and therefore its acceleration—is constant. The other graphs have changing slopes, so their acceleration is not constant throughout.

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