  We investigate the cooperative effects on optical forces in a system of N two
level atoms occupying a volume of dimensions to within $\lambda ^3$, where
lambda is radiation wavelength and is driven by a coherent radiation field with
a spatial profile like Laguerre-Gaussian beam or ideal Bessel beam.We show a
dramatic enhancement on optical forces as well as the angular momentum imparted
to the atom by a factor of $N ^2$.
