The mathematical equation for studying the photoelectric effect iswhere v is the frequency...

The mathematical equation for studying the photoelectric effect is

where v is the frequency of light shining on the metal; W is the energy needed to remove an electron from the metal: and me and u are the mass and speed of the ejected electron, respectively. In an experiment, a student found that a maximum wavelength of 351 nm is needed to just dislodge electrons from a zinc metal surface. Calculate the velocity (in m/s) of an ejected electron when the student employed light with a wavelength of 313 nm.