A mass m$=4\mathrm{.}2$kgm$=4\mathrm{.}2$kg is at the end of a horizontal spring of spring constant k$=175$N$/$mk$=175$N$/$m on a frictionless horizontal surface. The block is pulled, stretching the spring a distance A$=9\mathrm{.}5$cmA$=9\mathrm{.}5$cm from equilibrium, and released from rest. Write an equation for the angular frequency of the oscillation in terms of the variables from the problem statement $($that is to say, just the symbols with no concern for their assigned values.$)$