alleryStart learning →If a plot of displacement versus time is a straight line, what does that say about the object's acceleration?
AThe acceleration is zero
BThe acceleration is nonzero
CThe acceleration is always positive
DThe acceleration is always negative
Answer & Solution
Correct answer: A. The acceleration is zero
1. A straight-line displacement graph has a constant slope, meaning constant velocity.
2. Acceleration measures how much the velocity itself is changing.
3. Since the velocity here never changes, the acceleration must be zero.
_Source: OpenStax Physics (CC BY 4.0), Ch 3 "Acceleration", section 3.2 Representing Acceleration with Equations and Graphs_
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