How far does the particle travel?

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    Particle Travel
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Homework Help Overview

The problem involves a charged particle moving towards a fixed charge, with the goal of determining how far the particle travels before coming to a stop. The subject area includes concepts from electrostatics and energy conservation.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • The original poster expresses confusion about the relevant equations and concepts, particularly regarding the relationship between kinetic energy (KE) and potential energy (PE). Some participants suggest using the conservation of energy principle, while others seek clarification on how to apply it.

Discussion Status

The discussion is ongoing, with participants sharing hints and expressing confusion about the conservation of energy concept. Some guidance has been offered regarding the relationship between kinetic and potential energy, but clarity on the application remains a topic of exploration.

Contextual Notes

Participants are grappling with the definitions and implications of kinetic and potential energy in the context of charged particles, and there is a noted lack of consensus on how to proceed with the problem.

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Homework Statement



A charge of -1.8 µC is fixed in place. From a horizontal distance of 0.0450 m, a particle of mass 2.25 10-3 kg and charge -1.7 µC is fired with an initial speed of 65.0 m/s directly toward the fixed charge. How far does the particle travel before its speed is zero?

Homework Equations



q(V) = 1/2mv^2 (??)

The Attempt at a Solution



I'm afraid I'm very lost on this one. I messed around with the equation for collisions a bit but I can't seem to get in the right direction much less get the answer.

I would be grateful if you guys could provide me with some hints to get started >.<
thanks!
 
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Welcome to PF!

hichangkyu said:
A charge of -1.8 µC is fixed in place. From a horizontal distance of 0.0450 m, a particle of mass 2.25 10-3 kg and charge -1.7 µC is fired with an initial speed of 65.0 m/s directly toward the fixed charge. How far does the particle travel before its speed is zero?

Hi hichangkyu! Welcome to PF! :smile:

Hint: just use KE + PE = constant. :smile:
 
I am having the same problem. I do not get KE + PE = constant?!
 
nckaytee said:
I am having the same problem. I do not get KE + PE = constant?!

Hi nckaytee! :smile:

KE = 1/2 mv2, and PE = … ? :smile:
 

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