The dynamical evolution of massless objects in star clusters aims to explore their dynamics during the dynamical evolution of such structures, which is not easy observable in star clusters, and still not possible in dense star clusters such as globular clusters. In a star cluster, the main phenomenon we are going to focus on are the mass segregation and core collapse. I will first introduce previous works that looked into the motion of these objects, and then I will numerically explore the dynamical evolution of such objects, varying the number density of the hosting star cluster. As a final point, I will try to confute if the relative large abundance of free-floating planets in our galaxy is due to their ejected free-floating planets. I will use NBODY6++GPU-ML (a N-body code which performs simulations with a large number of particles and massless particles, i.e., star clusters with free-floating planets). The results pinpoint how the massless particles are not particularly affected by mass segregation, but only by the central gravitational evolution of the core of the star cluster, suggesting that those particles, in relatively dense star clusters, are ejected only at much larger timescales.