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Question
Diagram shows a velocity – time graph for a car starting from rest. The graph has three sections AB, BC, and CD.
Is the magnitude of acceleration higher or lower than that of retardation? Give a reason.
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Solution
Acceleration = slope of AB = `"Bt"/"At"="v"_0/"t"` ......(i)
Retardation = slope of CD = `"v"_0/(1/2"t")=2 "v"_0/"t"` ..........(ii)
∵ Magnitude of retardation is twice the magnitude of acceleration.
∴ Magnitude of acceleration is lower.
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