What is the speed at a great distance from the alpha particle

  • #1
13
0

Homework Statement



An alpha particle has a charge of 2e and is fixed at the origin. A proton is located 2.00x10^-8 m from the alpha particle along the x-axis. When the proton is released, what is its speed at a great distance from the alpha particle

q = 2e
r = 2.00x10^-8
v = ?

Homework Equations



ɛ = kq / r
ɛ = ΔV / r
ΔE = qΔV
E = kq1q2 / r

The Attempt at a Solution



I have no idea how to start this one. As every way I can think of doing it results in missing information that is needed to solve for v. For example when I tried to solve for ɛ and then use it to solve for ΔV, and use that to solve for ΔE, I get stuck with EE = EK but no mass to solve for v.
 
Last edited:

Answers and Replies

  • #2
13
0
Fixed formatting problem
 
Last edited:
  • #3
haruspex
Science Advisor
Homework Helper
Insights Author
Gold Member
33,757
5,552
What is the PE of the system initially? What is its final PE? Also consider momentum.
 

Related Threads on What is the speed at a great distance from the alpha particle

  • Last Post
Replies
1
Views
9K
Replies
3
Views
1K
  • Last Post
Replies
1
Views
1K
  • Last Post
Replies
1
Views
16K
Replies
3
Views
12K
  • Last Post
Replies
6
Views
2K
Replies
5
Views
24K
Replies
4
Views
1K
Replies
9
Views
3K
Replies
7
Views
19K
Top