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Speed of an Electron in an Electric Field

  • Thread starter HELLO11
  • Start date
  • #1
19
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1. Homework Statement

. Homework Statement

Two stationary positive point charges, charge 1 of magnitude 3.25 nC and charge 2 of magnitude 1.55nC , are separated by a distance of 57.0cm . An electron is released from rest at the point midway between the two charges, and it moves along the line connecting the two charges.

find Vfinal of the electron when it is 10.0 cm from charge 1 the want the final answer in m/s

i dont get any of this my professor went to fast. can anyone help?

2. Homework Equations

not sure

3. The Attempt at a Solution
 

Answers and Replies

  • #2
berkeman
Mentor
56,139
6,169
What is the equation for the electric field due to a point charge?

What is the equation for the force on a charge due to an electric field?

What is the equation relating force, mass and acceleration?

What is the equation of motion of a mass experiencing a force?
 
  • #3
19
0
I figured out the Uinital=-2.42e-17J, Kinitial= 0J, Ufinal is -5.15e-17J where do i go from here
 
  • #4
alphysicist
Homework Helper
2,238
1
Hi HELLO11,

Energy is conserved in this situation; but Uinitial is not equal to Ufinal. In what form is the rest of the energy at the final point? Once you have that you'll be able to find the speed of the electron.
 

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