A particle has a velocity u towards east at
t = 0. Its acceleration is towards west and is constant. Let xA and xB be the magnitude of displacements in the first 10 seconds and the next 10 seconds

The initial velocity is u and the acceleration is opposite to the initial velocity. This is similar to the situation when a particle is thrown vertically upward with some initial velocity. Therefore, we know that the velocity will become zero after some time (at the highest point) and the particle will return. Hence




Since, the value of acceleration is not given; we cannot determine the relation between the displacements. Also, we can’t say that the particle will return after or before 10 seconds.

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