# Homework Help: Centripetal acceleration of electron

1. Nov 30, 2009

### lovemake1

1. The problem statement, all variables and given/known data
In the Bohr model of the hydrogen atom, the electron revolves around the nucleus. If the radious of the orbit is 5.3x10^-11 m and the electron makes 6.6^13 r/s find

a)the acceleration of the electron and
b)the centripetal force acting on the electron. (this force is due to the attarction between the positively charged nucleus and the negatively charged electron) The mass of the electron is 9.1x10^-31

2. Relevant equations

ac = 4pi^2rf^2

3. The attempt at a solution
im not quite understanding part a). its asking for the acceleration of the electron but how can you find acceleration ? isnt it centripletal acceleration?
could someone direct me in the right direction ? do i use ac = 4pi^2rf^2 ?

2. Nov 30, 2009

### rock.freak667

yes it is asking for the centripetal acceleration, ac which is given by

$$a_c=\frac{v^2}{r}=v\omega = \omega^2 r$$