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JEE Main Physics question

PhysicsMotion in a Straight LineJEE Main

A point starts moving in a straight line with a certain acceleration from rest. At a time after the beginning of motion, the acceleration suddenly becomes retardation of the same value. The time in which the point returns to the initial point is

Answer: (C)

Solution

At the switch, , . Let = time after the switch:

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Question ID VK-152499