What type of motion is OA, AB, BC?

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Retardation, uniform speed, acceleration

Uniform speed, acceleration, retardation

Acceleration, uniform speed, retardation

Uniform, retardation, acceleration

answer is C.

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Detailed Solution

From the given graph, the particle accelerates at OA, at uniform speed at AB and decelerates at BC.
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OA, AB and BC are straight-line graphs between speed and time. In OA, the speed increases with time, so it represents acceleration. In AB, the speed is constant with time, representing uniform speed motion. In BC, the speed decreases with time, representing retardation or negative acceleration.

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