Photoelectrons with a maximum speed of 7.00 · 105 m/s are ejected from a surface in the presence of light with a frequency of 8.00 · 1014Hz. If the mass of an electron is 9.1 · 10-31 kg, calculate the maximum kinetic energy of a single electron, in joules. I really just need to know what formula I would even use.

Question

anonymous · Answer

KE max = (1/2) m v^2

anonymous · Answer

I feel like an idiot, but could you tell me what the m and v stand for? It seems to vary from section to section :(

praxer · Answer

m is the mass and v is the velocity.

anonymous · Answer

m is mass of the object
v is its velocity

anonymous · Answer

okay thanks