Centripetal acceleration of electron

[lovemake1]

Homework Statement

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

Homework Equations

ac = 4pi^2rf^2

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 ? isn't it centripletal acceleration?
could someone direct me in the right direction ? do i use ac = 4pi^2rf^2 ?

 

[rock.freak667]

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

[tex]a_c=\frac{v^2}{r}=v\omega = \omega^2 r[/tex]

 

[kerimek]

I can provide a response to the question posed. In the Bohr model of the hydrogen atom, the electron is in constant motion around the nucleus, which means it is constantly accelerating towards the nucleus due to the attractive force between the positively charged nucleus and the negatively charged electron. This type of acceleration is known as centripetal acceleration, which is the acceleration towards the center of a circular motion.

To find the value of this acceleration, we can use the formula ac = 4π^2rf^2, where ac is the centripetal acceleration, r is the radius of the orbit, and f is the frequency of the electron's motion. In this case, we are given the radius (5.3x10^-11 m) and the frequency (6.6x10^13 r/s), so we can plug these values into the formula to find the centripetal acceleration of the electron.

a) ac = 4π^2rf^2
= 4π^2(5.3x10^-11 m)(6.6x10^13 r/s)^2
= 4π^2(5.3x10^-11 m)(4.356x10^27 r^2/s^2)
= 9.06x10^17 m/s^2

Therefore, the centripetal acceleration of the electron in the Bohr model of the hydrogen atom is 9.06x10^17 m/s^2.

b) To find the centripetal force acting on the electron, we can use the formula Fc = mac, where Fc is the centripetal force, m is the mass of the electron, and ac is the centripetal acceleration we just calculated.

Fc = mac
= (9.1x10^-31 kg)(9.06x10^17 m/s^2)
= 8.26x10^-13 N

Therefore, the centripetal force acting on the electron in the Bohr model of the hydrogen atom is 8.26x10^-13 Newtons. This force is due to the attractive force between the nucleus and the electron, and it is what keeps the electron in its orbit around the nucleus.