Register to reply

Electrostatics, finding velocity

by physics604
Tags: electrostatics
Share this thread:
physics604
#1
Jun11-13, 08:57 PM
P: 92
1. An electron orbits the nucleus of an atom with velocity v. If this electron were to orbit the same nucleus with twice the previous orbital radius, its orbital velocity would now be

a) [itex]\frac{v}{2}[/itex]
b) v
c) 2v
d) [itex]\frac{v}{√2}[/itex]


2. Relevant equations

[itex]\Delta[/itex]Ek + [itex]\Delta[/itex]Ep = 0 ?

3. The attempt at a solution

I'm not really sure how I should start this question. None of the equations I have include both the v and the r variable.
Phys.Org News Partner Science news on Phys.org
Experts defend operational earthquake forecasting, counter critiques
EU urged to convert TV frequencies to mobile broadband
Sierra Nevada freshwater runoff could drop 26 percent by 2100
berkeman
#2
Jun11-13, 10:05 PM
Mentor
berkeman's Avatar
P: 41,109
What is the equation for electrostatic attraction?
physics604
#3
Jun11-13, 10:41 PM
P: 92
F = kQ1Q2 / r2

But I don't see how that helps.

berkeman
#4
Jun12-13, 12:01 AM
Mentor
berkeman's Avatar
P: 41,109
Electrostatics, finding velocity

Quote Quote by physics604 View Post
F = kQ1Q2 / r2

But I don't see how that helps.
And the equation that we use for centripital force for uniform circular motion? There is a reason that we ask you to list the Relevant Equations...


Register to reply

Related Discussions
Finding initial velocity given displacement, time, and final velocity Introductory Physics Homework 1
Electrostatics - Finding potential V(r,z) given hyperbolic boundry conditions. Advanced Physics Homework 1
Is there a formula in electrostatics analogous to escape velocity? Classical Physics 4
Electrostatics - finding magnitude of a third charged particle Introductory Physics Homework 8
Electrostatics. finding the resultant force! Introductory Physics Homework 1