Resource Lesson
Coulomb's Law: Suspended Spheres
Printer Friendly Version
This example blends electrostatics, freebody diagrams, equilibrium conditions, and basic right triangle trigonometry.
Refer to the following information for the next seven questions.
In this example we will examine two identical spheres each of mass 5 grams and charge q that are suspended from two light uncharged, nonconducting threads of length 40 cm. Each string makes an angle of 15º with the vertical.
Our ultimate task will be to calculate the charge on each sphere.
Draw a freebody diagram showing the forces that act on the right sphere.
Calculate the weight of each sphere.
Develop an expression for the repulsive electrostatic force on the sphere.
Since are spheres are in equilibrium, write the expression for net F
_{x}
= 0.
Since are spheres are in equilibrium, write the expression for net F
_{y}
= 0.
What is the magnitude of the tension in the string?
What is the magnitude of the charge on each sphere?
Related Documents
Lab:
Labs -
Aluminum Foil Parallel Plate Capacitors
Labs -
Electric Field Mapping
Labs -
Electric Field Mapping 2
Labs -
Mass of an Electron
Labs -
RC Time Constants
Resource Lesson:
RL -
A Comparison of RC and RL Circuits
RL -
Capacitors and Dielectrics
RL -
Continuous Charge Distributions: Charged Rods and Rings
RL -
Continuous Charge Distributions: Electric Potential
RL -
Coulomb's Law: Beyond the Fundamentals
RL -
Derivation of Bohr's Model for the Hydrogen Spectrum
RL -
Dielectrics: Beyond the Fundamentals
RL -
Electric Field Strength vs Electric Potential
RL -
Electric Fields: Parallel Plates
RL -
Electric Fields: Point Charges
RL -
Electric Potential Energy: Point Charges
RL -
Electric Potential: Point Charges
RL -
Electrostatics Fundamentals
RL -
Famous Experiments: Millikan's Oil Drop
RL -
Gauss' Law
RL -
LC Circuit
RL -
Parallel Plate Capacitors
RL -
Shells and Conductors
RL -
Spherical, Parallel Plate, and Cylindrical Capacitors
Review:
REV -
Drill: Electrostatics
REV -
Electrostatics Point Charges Review
Worksheet:
APP -
The Birthday Cake
APP -
The Electrostatic Induction
CP -
Coulomb's Law
CP -
Electric Potential
CP -
Electrostatics: Induction and Conduction
NT -
Electric Potential vs Electric Potential Energy
NT -
Electrostatic Attraction
NT -
Lightning
NT -
Photoelectric Effect
NT -
Potential
NT -
Van de Graaff
NT -
Water Stream
WS -
Capacitors - Connected/Disconnected Batteries
WS -
Charged Projectiles in Uniform Electric Fields
WS -
Combinations of Capacitors
WS -
Coulomb Force Extra Practice
WS -
Coulomb's Law: Some Practice with Proportions
WS -
Electric Field Drill: Point Charges
WS -
Electric Fields: Parallel Plates
WS -
Electric Potential Drill: Point Charges
WS -
Electrostatic Forces and Fields: Point Charges
WS -
Electrostatic Vocabulary
WS -
Parallel Reading - The Atom
WS -
Standard Model: Particles and Forces
TB -
Advanced Capacitors
TB -
Basic Capacitors
TB -
Electric Field Strength vs Electric Potential
PhysicsLAB
Copyright © 1997-2023
Catharine H. Colwell
All rights reserved.
Application Programmer
Mark Acton