Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
SUROJ
Group Title
how to find the time required to fall an electron to proton when electron is attracted to proton?
 2 years ago
 2 years ago
SUROJ Group Title
how to find the time required to fall an electron to proton when electron is attracted to proton?
 2 years ago
 2 years ago

This Question is Closed

roadjester Group TitleBest ResponseYou've already chosen the best response.0
Dang, you're gonna need to specify that it's electromagnetism. I've only gotten to the "Mechanics" section of physics. :(
 2 years ago

JamesJ Group TitleBest ResponseYou've already chosen the best response.0
What is the Coloumb force between the two particles? It is \[ F = \frac{ke^2}{r^2} \] where e is the charge on electron/proton, r is the distance between them and k is the Coloumb constant. Now if you want to solve the problem of how it would take for an electron and proton initially at rest to collide, you'll need to solve the (mechanics!) problem of for what time t is r(t) = 0. This is not an easy problem. You can find another working of that sort of problem here: http://openstudy.com/study?login#/updates/4f42fe64e4b065f388dc742a
 2 years ago

angelina Group TitleBest ResponseYou've already chosen the best response.0
see you have the force experienced by the electron due to proton which is F=k e^2/r^2 if you have the dist b/w them and they are at rest. now dividing it by mass of the electron you would get the accln and then u can calculate the time by the formula s=ut + 1/2at^2. but if they were not initially at rest then i dont know and if u come to know plz let me also know it
 2 years ago

JamesJ Group TitleBest ResponseYou've already chosen the best response.0
(*correction: link I gave above is not correct; it is this one below) You can't naively apply s = ut + at^2/2 because here the acceleration is not constant precisely because F as a function of distance r is not a constant. See this link for how to solve the resulting differential equation: http://openstudy.com/study#/updates/4f0de661e4b084a815fcff56
 2 years ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.