Question

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

(a) x_A < x_B

(b) x_A=X_B

(C) X_A>X_B

(d) the information is insufficient to decide the relation
of x_A with x_B

Answer 1

(d) the information is insufficient to decide the relation of x_A with x_B.

Explanation:

Magnitude of displacement depends up on initial velocity, time Duration and acceleration. In this case only time is known while magnitude of initial velocity and acceleration is unknown. These two displacements could only be comparable if directions of initial velocity and acceleration had been the same. Since in this case directions are opposite, their magnitudes need to be known, So there is not sufficient information.