  We study the tunneling conductance of a ballistic normal metal / ferromagnet
/ spin-triplet superconductor junction using the extended
Blonder-Tinkham-Klapwijk formalism as a model for a $c$-axis oriented Au /
SrRuO$_{3}$ / Sr$_{2}$RuO$_{4}$ junction. We compare chiral $p$-wave (CPW) and
helical $p$-wave (HPW) pair potentials, combined with ferromagnet magnetization
directions parallel and perpendicular to the interface. For fixed $\theta_{M}$,
where $\theta_{M}$ is a direction of magnetization in the ferromagnet measured
from the $c$-axis, the tunneling conductance of CPW and HPW clearly show
different voltage dependencies. It is found that the cases where the $d$-vector
is perpendicular to the magnetization direction (CPW with $\theta_{M} = \pi/2$
and HPW with $\theta_{M} = 0$) are identical. The obtained results serve as a
guide to determine the pairing symmetry of the spin-triplet superconductor
Sr$_{2}$RuO$_{4}$.
