What Equations Calculate Kinetic Energy and Work Function in Physics?

[raladin3d]

how to solve this problem? :( help

Hello, I have this questions which I am confused at, :( I can't figure out what equation to use to solve it :(

given that the frequency of Barium is 6.25X10^14 Hz and the cutoff Potential is 0.10V find the Max Kenitic Energy, threshold frequencie and work function

thanks a lot I would really appreciate the help :)

 

[rock.freak667]

Well start with the cut off potential, ask yourself, what exactly is this quantity?

If they said that the frequency of Ba is 6.25(10¹⁴)Hz, which frequency is this?

 

[raladin3d]

Well start with the cut off potential, ask yourself, what exactly is this quantity?

If they said that the frequency of Ba is 6.25(10¹⁴)Hz, which frequency is this?

asked myself, and couldn't answer it :(

Is it possible that I should use the equation E=eV ?

 

[rock.freak667]

asked myself, and couldn't answer it :(

Is it possible that I should use the equation E=eV ?

Yes but do you know why you would use that equation?

Wouldn't the cut-off potential be the potential difference needed to stop the electrons from being emitted?