Solve Electrostatic Forces Homework: Tension & Charge

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SUMMARY

The discussion focuses on solving a physics homework problem involving two charged pith balls suspended by threads. The key equations utilized include the electrostatic force equation, Fe=(kq1q2)/d², where k is the electrostatic constant. The problem requires calculating the tension in the threads and the magnitude of the charge on each ball, given their mass of 0.115 grams and the distance between them of 15.0 centimeters. A free body diagram is essential for visualizing the forces acting on the pith balls.

PREREQUISITES
  • Understanding of electrostatic forces and Coulomb's Law
  • Ability to draw and interpret free body diagrams
  • Knowledge of basic trigonometry for resolving forces
  • Familiarity with the concept of tension in strings
NEXT STEPS
  • Study the derivation of Coulomb's Law and its applications
  • Learn how to analyze free body diagrams in static equilibrium
  • Explore the concept of tension in various physical scenarios
  • Investigate the relationship between charge, distance, and force in electrostatics
USEFUL FOR

Students studying physics, particularly those focusing on electrostatics and mechanics, as well as educators seeking to enhance their teaching methods in these topics.

drmjj55
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Homework Statement


Two 0.115-gram pith balls are suspended from the same point by threads 22.0 centimeters long. When the balls are given equal charges, the two strings form an angle between them, and the balls come to rest 15.0 centimeters apart. Neglect the mass of the thread.

What is the tension in each thread?
What is the magnitude of the charge on each ball?

Homework Equations


Fe=(kq1q2)/d2


The Attempt at a Solution


I drew a free body diagram, having the weight straight down, the tension at some angle, and the electrostatic force at some other angle. From this w=T+Fe The only problem is that I am having trouble finding q1 and q2.
 
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Welcome to PF;
drmjj55 said:
I drew a free body diagram, having the weight straight down, the tension at some angle, and the electrostatic force at some other angle.
What other angle?

From this w=T+Fe The only problem is that I am having trouble finding q1 and q2.
Check the problem statement:
Two 0.115-gram pith balls are suspended from the same point by threads 22.0 centimeters long. When the balls are given equal charges, the two strings form an angle between them, and the balls come to rest 15.0 centimeters apart. Neglect the mass of the thread.
 

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