Question

if the angle between force and displacement is 0 then for what value of 0 work done ​

Answer 1

If cosθ=1, maximum amount work can be done on the body i.e. if θ=0 or the directions of F and s are parallel. If cosθ=0 then the work done on the body will be zero i.e. when the angle between the force and the displacement is 90o.