# Centripital acceleration (electron movement)

1. Oct 29, 2007

### ~christina~

1. The problem statement, all variables and given/known data
In bohr model of H atom, speed of electron/ e- is aproximately 2.20x10^6 m/s

a) find force acting on e- as it revolves in a circular orbit of radius 0.530x10^-10

b) the centripital acceleration of the e-

2. Relevant equations
$$\sum F= ma= m(v^2/r)$$

3. The attempt at a solution

Well I'm not sure if I'm going in the right direction ...

does the electron have a x and y component of force?

a) m e-= 9.109x10^-31 kg

$$\sum F= ma= m(v^2/r)$$

(9.109x10^-31kg) ( (2.20x10^6)^2/ 0.530x10^-10)= 8.32x10^-8 N

b)
$$a_c= v^2/r = 9.13x10^ 22 m/s^2$$

can someone see if this is alright for me?

Thanks

2. Oct 29, 2007

### Kurdt

Staff Emeritus
Looks fine. The force is directed toward the centre of motion.

3. Oct 29, 2007

### ~christina~

so there wouldn't be a x /y component of sum of F forces?

4. Oct 29, 2007

### Kurdt

Staff Emeritus
What forces are you thiking about?

5. Oct 29, 2007

### ~christina~

well I was originally thinking that there was a force in a x or y direction however thinking about it if it's moving in a circular motion but the direction is not specified thus it wouldn't matter for this question.

Thanks