How Do Forces Between Protons and Electrons Compare in Physics?

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    Coulomb's law Law
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SUMMARY

The electrostatic force exerted by a proton on an electron is equal in magnitude to the force exerted by an electron on a proton, as established by Newton's Third Law of Motion. The gravitational force, however, is negligible in comparison due to the significantly smaller mass of the electron relative to the proton. The relevant equation for calculating the electrostatic force is F = kq1q2 / r², where k is the Coulomb's constant, q1 and q2 are the charges, and r is the distance between the charges. The forces remain consistent regardless of which particle is being acted upon, affirming the symmetry in electrostatic interactions.

PREREQUISITES
  • Understanding of Newton's Third Law of Motion
  • Familiarity with Coulomb's Law and the equation F = kq1q2 / r²
  • Basic knowledge of electrostatics and gravitational forces
  • Concept of mass and charge in physics
NEXT STEPS
  • Study the implications of Newton's Third Law in various physical systems
  • Explore Coulomb's Law in-depth, including applications in electrostatics
  • Investigate the differences between gravitational and electrostatic forces
  • Learn about the role of mass and charge in particle interactions
USEFUL FOR

Students of physics, educators teaching electrostatics, and anyone interested in the fundamental forces governing particle interactions.

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Homework Statement


How does …
(a) the electrostatic force exerted by a proton on an electron compare to the electrostatic force exerted by an electron on a proton?
(b) the gravitational force exerted by a proton on an electron compare to the gravitational force exerted by an electron on a proton?


Homework Equations


F = kq1q2 / r2


The Attempt at a Solution


Will the opposites attract when their is electrostatic force?
And repel when there is a gravitational force
 
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Newton's 3rd Law is all you need.

And repel when there is a gravitational force
Gravity acts on Mass, not electric charge.
 
How would the electrostatic force compare from a proton on a electron to vice- versa?
 
Does the electrostatic force stay the same because the charge of the proton and electron are the same as well as the coulomb constant and radius?
 
F=\frac{q_1q_2}{4\pi\epsilon_0r^2} is the magnitude of the force. Will that change?
q_1q_2=q_2q_1 since they are scalars. But you don't even need that equation to answer the question (your teacher might want you to compute it anyway, but it is unnecessary to answer the question). The answer comes from Newton's third law.
 
Does the electrostatic force stay the same because the charge of the proton and electron are the same as well as the coulomb constant and radius?

Yes. Those are the same. All that changes is which particle is being acted upon.
 

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