Answer
2.5 m/s²
Explanation
Acceleration is the change in velocity divided by the time interval: (15.0 - 5.0) m/s divided by 4.0 s equals 2.5 m/s².
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A car speeds up uniformly from 5.0 m/s to 15.0 m/s in 4.0 s. What is its acceleration?
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