## Kinetic energy equation

abbydouglas1K
Posts: 65
Joined: Fri Sep 28, 2018 12:26 am

### Kinetic energy equation

I know that to solve for the kinetic energy of a photon the equation is Ek=(1/2)mv^2 but where do we find the values of the mass of the specific electron ?

Joon Chang 2F
Posts: 59
Joined: Fri Sep 28, 2018 12:25 am

### Re: Kinetic energy equation

The mass of an electron is 9.10938 × 10^-31 kilograms. This will probably be given on the constants page of the tests.

Chloe Thorpe 1J
Posts: 77
Joined: Fri Sep 28, 2018 12:16 am

### Re: Kinetic energy equation

As far as I know, electrons have the same mass of 9.109 x 10^-31 kg.

sameeksha_panda_3h
Posts: 31
Joined: Fri Sep 28, 2018 12:25 am

### Re: Kinetic energy equation

Yeah don't worry too much about finding the mass of the electron specifically yourself. It should be on the formula card as it's a constant.

Alma Carrera 3C
Posts: 33
Joined: Fri Apr 06, 2018 11:02 am

### Re: Kinetic energy equation

Yeah, Professor Lavelle said we would be given a sheet with all the constants so its not necessary to memorize them, but after using them over and over again it'll eventually stick to you.