### How to find the kinetic energy of ejected electrons?

Posted:

**Tue Sep 29, 2015 8:49 pm**Light hits a sodium metal surface and the velocity of the ejected electron is 6.61 x 105 m.s-1. The work function for sodium is 150.6 kJ.mol-1. What is the kinetic energy of the ejected electron?

I did see a previous post with this question but it wasn't clear to me how to actually solve it. If I used hv- work function = Ek would there be any way to find v or am I using the wrong equation?

I did see a previous post with this question but it wasn't clear to me how to actually solve it. If I used hv- work function = Ek would there be any way to find v or am I using the wrong equation?