Question

we need to find from above photo velocity and displacement of particle at time 2 sec

Answer 1

For velocity apply v=u + a*t and for displacement s=u*t + (1/2)a*t^2.

if you need magnitude of displacement and velocity then apply
|v|=√(vx^2 + vy^2)
|s| = √(sx^2 + sy^2)