How Fast Does an Electron Travel in a Weak Electric Field with Gravity?

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Homework Help Overview

The problem involves an electron released in a weak electric field, with considerations for gravitational force. The objective is to determine the speed of the electron after it has traveled a specified vertical distance.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants discuss the forces acting on the electron, including those from the electric field and gravity. Questions arise regarding the net force and how to utilize this information to find the electron's speed. Some participants express confusion about the underlying concepts and seek additional resources for better understanding.

Discussion Status

The discussion is ongoing, with participants exploring different aspects of the problem. Some guidance has been offered regarding the forces involved and potential steps to take, but no consensus or resolution has been reached yet.

Contextual Notes

Participants mention difficulties in grasping the concepts related to electric fields and kinematics, indicating a need for further clarification and resources.

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Homework Statement



An electron is released from rest in a weak electric field given by vector E = -2.40 10-10 N/C jhatbold. After the electron has traveled a vertical distance of 1.8 µm, what is its speed? (Do not neglect the gravitational force on the electron.)

Dont even know where to begin.
 
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Steps to consider:
whats the force on the electron due to the E field?
what about due to gravity?
Whats the net force?
How can you use that information?
 
zhermes said:
Steps to consider:
whats the force on the electron due to the E field?
what about due to gravity?
Whats the net force?
How can you use that information?

do you know of any good online physics resources for electro fields? I am having some trouble understanding everything the professor is teaching, and i know this stuff should be much easier than i am making it!
 
I would find the acceleration of the electron. Then look at your kinematic equations
 

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