Posted by yanis on .
If a protonand an electron are released when they 2.0X10^10m apart, find the initial accelerationof each of them.
I know a=ke^2/mr^2
k = 8.99 x 10^9
e = 1.6 x 10^19
r = 2.0x 10^10
so what is the m ????

physics 
Lucy,
The mass of the electron is 1.6 x 10^19 kg
The mass of the proton is 1.66 x 1027 kg