When are the diplacement and velocity in the same direction in SHM?

When are the velocity and acceleration in the same direction SHM?

Can displacement and acceleration be in the same direction in S.H.M. ?

What is the phase relationship between diplacement, velocity and acceleration in SHM?

What is the phase relationship between diplacement, velocity and acceleration in SHM?

For a particle undergoing SHM, when will be its (a)velocity and displacement in the same direction (b) velocity and acceleration in the same direction (c ) displacement and acceleration in the same direction

How can the relative velocity be determined when two particles are moving with different velocities (i) in the same direction and (ii) in opposite directions ?