Q:  Is the expression for omega equal to the expression for velocity?

          No, the expression for omega has units of 1/s, but the
          expression for velocity has units of m/s.



  Q:  How are the two related?

          We ought to be able to multiply the expression for omega
          by some length -- such as the length of the string --
          and end up with an expression which looks similar to that
          for velocity.

          Try it!