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Velocity-time graph?

Finish this statement/phrase:
"What does a constant slope mean in a velocity-time graph? Slope means acceleration. Therefore, if we have a constant slope, we have a constant ______."
 
(1) constant acceleration 
(2) constant velocity 
(3) changing acceleration 

1 Answer by Expert Tutors

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Arturo O. | Experienced Physics Teacher for Physics TutoringExperienced Physics Teacher for Physics ...
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A constant slope in a velocity vs. time graph means that the body is accelerating at a constant rate, since
 
Δv/Δt = a = constant = slope 
 
The correct answer is (1), constant acceleration.