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JEE Main Physics question

PhysicsMotion in a Straight LineJEE Main

A body moves for a total of nine seconds, starting from rest with uniform acceleration and then with uniform retardation which is twice the value of the acceleration, and then stops. The duration of uniform acceleration is

Answer: (D)

Solution

Let acceleration phase last (rate ) and retardation phase last (rate ),

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Question ID VK-151909