A particle is executing SHM between points-`X_(m)andX_(m)`, as shown in figure(i). The velocity V(t) of the particle is partially graphed and shown in figure (ii). Two points A and B corresponding to time `t_(1)` and time `t_(2)` respectively are marked on the V(t) curve.

Options

A. At time `t_(1)`, it ios going towards `X_(m)`.
B. At time `t_(1)`, its speed is decreasing
C. At time `t_(2)`, its position lies in between `-X_(m)` and O
D. The phase difference `Deltaphi` between points A and B must be expressed as `90^(@)ltDeltaphilt180^(@)`.

Answer

B, C