Don't use a Transient Structural analysis to get these answers.

Use a Modal analysis and a Harmonic Response analysis linked together.  Drag the Solution cell from the Modal analysis onto the Setup cell of the Harmonic Response.

In the Analysis Settings of the Modal analysis, request enough modes until you have modes that are up to 60 Hz.  There are more detailed rules but this will get you started.

In the Analysis Settings of the Harmonic Response, request results in the frequency range of 25 to 35 Hz.

Apply a load of 0.3 N.  It will be treated as a sinusoidal force and the frequency will be swept over the range specified above. You can plot the maximum reaction force as a function of frequency.