Centripital acceleration (electron movement)

[~christina~]

Homework Statement

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-

Homework Equations

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

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

 

[Kurdt]

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

 

[~christina~]

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

 

[Kurdt]

What forces are you thiking about?

 

[~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