A) the particle starts with a certain velocity, but the motion is retarded, finally the particle stops
B) the velocity of the particle is constant throughout
C) the acceleration of the particle is constant throughout
D) the particle starts with certain velocity and then its motion is accelerated.
Correct Answer: A
Solution :
The slope of x-t graph at t = 0 is positive i.e., initial velocity of the particle is +ve and x-t graph is concave down, so it means acceleration is negative but whenever it is constant or not it cannot be predicted from given information. As v and acceleration are in opposite directions, then motion is the retarded one and finally the particle stops.
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