Introductory Physics Homework Help Forum

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Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Frictional Torque of a Flywheel
  • poortech
  • · Replies 9 ·
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9
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10K
Calculate number of nodes in stationary waves
  • markus92
  • · Replies 6 ·
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6
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4K
Calculate the work done by tension
  • physicslover14
  • · Replies 48 ·
2
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48
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7K
How High Does a Block Reach on an Inclined Plane?
  • Chemistrystrng
  • · Replies 19 ·
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19
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3K
Is the Magnitude of an Electric Field Consistent Across All Spatial Locations?
  • BadSkittles
  • · Replies 3 ·
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3
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1K
Projectile Problem: Solving for θ=60° | Sinθ = ±√3 Solution
  • AakashPandita
  • · Replies 6 ·
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6
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2K
How to Calculate Speed When an Object Hits Another?
  • wangwang2626
  • · Replies 3 ·
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3
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2K
Linear algebra.Kernel of a linear mapping
  • manuel325
  • · Replies 1 ·
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1
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1K
Moment of Inertia through center of mass
  • eprparadox
  • · Replies 3 ·
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3
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2K
How long will it take an electromagnetic wave to reach a satellite
  • aChordate
  • · Replies 4 ·
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4
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2K
How Long Will It Take for the Car to Collide with the Truck?
  • wangwang2626
  • · Replies 3 ·
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3
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2K
What Bandgap Energy Range is Required for Blue LEDs?
  • aChordate
  • · Replies 3 ·
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3
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2K
Obtain transfer resistances and use them to find these two currents
  • s3a
  • · Replies 1 ·
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1
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Measurement uncertainty and error
  • eroxore
  • · Replies 25 ·
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25
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4K
[Astrophysics] Star luminosity-radius-temperature problem
  • Andrev
  • · Replies 1 ·
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1
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2K
Cutoff frequency in this circuit
  • bznm
  • · Replies 2 ·
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2
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2K
Physics G.11 Question on Forces/Newton's Laws and Friction
  • Michael Li
  • · Replies 5 ·
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5
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4K
Gravitation - Period of revolution of planet
  • Saitama
  • · Replies 10 ·
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10
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6K
Discussion for Centre of Gravity of an irregular shaped object(Lamina)
  • ilovephysics22
  • · Replies 1 ·
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1
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18K
How High Does a Cannonball Go When Fired Straight Up at 28m/s?
  • mayhemlikeme
  • · Replies 3 ·
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3
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2K
Dipole antenna and electromagnetic waves
  • aChordate
  • · Replies 1 ·
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1
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2K
Linear algebra-Basis of a linear map
  • manuel325
  • · Replies 4 ·
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4
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2K
Derive the Electric Field Outside an Ideal Conductor
  • ladyrx2020
  • · Replies 2 ·
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2
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4K
How long for 2 particles to collide due to gravity?
  • thecommexokid
  • · Replies 30 ·
2
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30
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7K
How to find the Angular Velocity?
  • Rococo
  • · Replies 16 ·
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16
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3K
Determining the Coefficient of Kinetic Friction on an Incline
  • Polus
  • · Replies 3 ·
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3
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6K
Using the Ideal Gas temperature scale
  • CAF123
  • · Replies 29 ·
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29
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6K
Difficult projectile motion question
  • sorax123
  • · Replies 8 ·
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8
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4K
How Does Temperature Affect the Fit Between a Brass Ring and an Aluminum Rod?
  • whitehorsey
  • · Replies 1 ·
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1
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2K
Calculating Force & Velocity of Friction
  • shin777
  • · Replies 5 ·
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5
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2K
Cylinders filled with liquid; placed on a trolley
  • Saitama
  • · Replies 24 ·
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24
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3K
Why Did the 1983 Conference Reject Defining c=3x10^8 or 1 m/s?
  • wifi
  • · Replies 2 ·
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2
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3K
Finding the frequency and wavelength of an electromagnetic wave
  • aChordate
  • · Replies 7 ·
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7
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2K
How Can You Triple the Energy Stored in a Capacitor Circuit?
  • sunflowerzz
  • · Replies 6 ·
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6
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7K
Why Does Battery Terminal Voltage Calculation Depend on Current Direction?
  • sunflowerzz
  • · Replies 4 ·
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4
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15K
Calculating acceleration with slug and lbs
  • tratata
  • · Replies 8 ·
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8
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8K
Finding range given impact velocity?
  • jerm174
  • · Replies 1 ·
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1
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2K
Confused by Relative Motion? Get Answers Here!
  • jwroblewski44
  • · Replies 2 ·
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2
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2K
Physics Question Over 2 Dimensional Friction Problems
  • Xazerd
  • · Replies 38 ·
2
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38
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7K
Calculating Velocity of Reflected Image in Concave Mirror
  • Saitama
  • · Replies 14 ·
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14
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7K
Pressure on manometer with different fluids
  • lilMissMindset
  • · Replies 15 ·
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15
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10K
Solving for Spring Compression with a Vertical Spring and Hanging Block
  • Anthonyphy2013
  • · Replies 7 ·
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7
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3K
Direct Collisions with objects moving in towards each other
  • Woolyabyss
  • · Replies 7 ·
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7
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2K
Displacement derived from Acceleration
  • tomtomtom1
  • · Replies 5 ·
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5
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2K
Is Work Done by an Ideal Gas Always Equal to P(Vf - Vi)?
  • nil1996
  • · Replies 3 ·
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3
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1K
Statics: Forces in Cartesian Vector form
  • rico22
  • · Replies 6 ·
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6
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4K
Find the coefficent of friction of one block
  • Robertoalva
  • · Replies 7 ·
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7
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2K
Solving a Stationary Block on a Frictionless Wedge
  • postfan
  • · Replies 25 ·
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25
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9K
Linear algebra- Inverse of a linear mapping
  • manuel325
  • · Replies 16 ·
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16
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4K
Tips for Studying Physics: How Can You Better Understand the Material?
  • babysnatcher
  • · Replies 3 ·
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3
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2K
Electric Charges Causing Centripetal Motion
  • mdf730
  • · Replies 2 ·
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2
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2K
Do a comet's tails ever point in the same direction when in an orbit?
  • s3a
  • · Replies 17 ·
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17
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4K
What is the magnitude of the ball's average horizontal velocity?
  • LiesselZ
  • · Replies 6 ·
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6
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2K
Find the Expression of an Electric Field Produced by a Dipole
  • ladyrx2020
  • · Replies 2 ·
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2
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8K
Understanding the Forces of a Moving Lift: T and T1
  • Bandarigoda
  • · Replies 4 ·
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4
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2K
Finding friction on a onedimensional tube
  • ShizukaSm
  • · Replies 1 ·
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1
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Comparing temperature on varying scales
  • CAF123
  • · Replies 11 ·
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11
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3K
What is the relationship between capacitors and inductors?
  • Questions999
  • · Replies 5 ·
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5
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Tangential and radial acceleration
  • babysnatcher
  • · Replies 23 ·
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23
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8K
Gravity: 9.8 m/s2 -Tangential Acceleration & Negativity Rules
  • babysnatcher
  • · Replies 3 ·
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3
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Ray optics - Reflection from sphere
  • Saitama
  • · Replies 24 ·
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24
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4K
Understanding the Right Hand Rule: Vector (AxB)
  • duplaimp
  • · Replies 3 ·
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3
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2K
Why Is My Thevenin Resistance Calculation Different from the Textbook's?
  • Questions999
  • · Replies 13 ·
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13
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2K
Rotation: mass transfer and angular momentum conservation
  • Avi Nandi
  • · Replies 4 ·
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4
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2K
Propagation of uncertainty for no-load voltage
  • beny748
  • · Replies 15 ·
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15
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2K
Finding distance of a block with an unattached spring
  • Robertoalva
  • · Replies 5 ·
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5
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2K
What is the direction of the E field at point P due to the sphere?
  • Questions999
  • · Replies 1 ·
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1
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1K
What is the detailed physics of the EMS maglev levitation system
  • rosieq1!
  • · Replies 2 ·
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2
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3K
Quantum Electron Energy Level for Hydrogenic atom
  • JewishDude
  • · Replies 3 ·
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3
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5K
How to calculate the time over which flux changes
  • poortech
  • · Replies 3 ·
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3
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5K
Use Mathematica and Kirchhoff's rules to find V out.
  • stripes
  • · Replies 16 ·
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16
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4K
Conceptual problems-Work done,KE and internal energy
  • Tanya Sharma
  • · Replies 8 ·
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8
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3K
Odd Form Of Eigenvalue - Coupled Masses
  • Recipi
  • · Replies 5 ·
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5
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2K
Why choose /100 over x100?Why Divide by 100 when solving decibels?
  • silversurf
  • · Replies 4 ·
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4
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3K
Displacement of a Rolling Ball with Initial Velocity and Constant Acceleration
  • physics.
  • · Replies 4 ·
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4
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2K
Semi-major axis equation question
  • eXmag
  • · Replies 11 ·
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11
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3K
Thermodynamics-Conceptual problem
  • Tanya Sharma
  • · Replies 5 ·
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5
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2K
Work done and change in the internal energy
  • Tanya Sharma
  • · Replies 16 ·
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16
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4K
How to Solve for F1 in a Net Torque Problem?
  • Arcarius
  • · Replies 1 ·
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1
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3K
Calculating longitude and latitude given the duration of sunset
  • andreea_a
  • · Replies 19 ·
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19
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5K
Projectile Motion: Solving for Optimal Cannon Angle in Avalanche Triggering
  • babysnatcher
  • · Replies 38 ·
2
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38
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5K
Vector spaces problem -linear algebra
  • manuel325
  • · Replies 2 ·
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2
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2K
Double slit interference missing maximum problem
  • PsychonautQQ
  • · Replies 15 ·
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15
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18K
How Does Compton Scattering Affect Photon Wavelength at 90 Degrees?
  • Questions999
  • · Replies 3 ·
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3
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2K
Do Electric and Magnetic Field Energies Depend on Their Sources?
  • Questions999
  • · Replies 1 ·
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1
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1K
Coriolis acceleration at the surface of a region in the ocean
  • hamilbr
  • · Replies 3 ·
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3
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2K
Closed integral problem: field in the plane of a magnetic dipole
  • Order
  • · Replies 2 ·
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2
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2K
Thermal Conductivity and Heat Transfer in a Hot Water Bottle
  • CAF123
  • · Replies 47 ·
2
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47
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6K
Power output of a solar panel if a complete row of cell is shadowed
  • fozia.jehan
  • · Replies 7 ·
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7
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3K
How do I find the time of a bullet embedded into a block on a spring?
  • agentlee
  • · Replies 1 ·
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1
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3K
Rotational Dynamics / Moment of Inertia Question
  • Arcarius
  • · Replies 10 ·
Replies
10
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10K
Rocket Kinematics: Acceleration and Maximum Altitude
  • caveman127
  • · Replies 6 ·
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6
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2K
Kinematics: when to use the quadratic formula?
  • catzmeow
  • · Replies 11 ·
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11
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11K
Numerical integration for sinsoidal wave
  • pyroknife
  • · Replies 1 ·
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1
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1K
Spring-Block system executing SHM in a freely falling elevator
  • vijaypandey93
  • · Replies 35 ·
2
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35
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7K
Including a heat for a phase change or not?
  • catzmeow
  • · Replies 6 ·
Replies
6
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2K
Amplitude of a Damped, Driven Pendulum
  • AJKing
  • · Replies 7 ·
Replies
7
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7K
Thermodynamics ice cube Problems
  • CAF123
  • · Replies 6 ·
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6
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3K
How do you solve these stroboscobe angular speed problems?
  • shin777
  • · Replies 19 ·
Replies
19
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3K
Calculating the height after an elastic collision
  • bna10
  • · Replies 1 ·
Replies
1
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3K