What is the subjective perception of frequency

The subjective perception of frequency is really important.  but first we need to know what it is. subjective perception of frequency or as we or other people also know as the pitch, this is the highness and the lowness of a sound. that is one example of the definition of subjective perception of frequency.

The subjective perception of frequency is pitch

Using the work-energy theorem, the total work done on the block as it slides to rest is the negative work performed by friction. If the average magnitude of friction is , then