An interesting point is to consider the final trajectory of the residues of explosion, assuming
that they continue to fall down to the ground with no air resistance, for safety reasons. In the
attempt of tracing the position of the particles on the ground, it is possible to calculate the time
in which an entire group of particles, call it Gj, falls on the ground after explosion, by setting
y
j(τ j ) = 0. By doing so, we find
τj = V1
g
cos θj +