Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
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What Happens to a Photon When Light is Reflected?
- PhilipF
- · Replies 1 ·
How to Approximate the Force When a Leashed Dog Runs?
- Lorens
- · Replies 3 ·
Solving a Problem with Air Mass: Calculating Pressure & Volume
- Izekid
- · Replies 2 ·
How Does Material Change Affect Wave Speed in a Slinky?
- runicle
- · Replies 1 ·
Finding the incline angle when power differs by 47 hp at constant speed
- scimanyd
- · Replies 3 ·
Why Does Calculating Maximum Height in Hooke's Law Give a Negative Value?
- Jon1NL8796
- · Replies 2 ·
Centripital Force and Coefficient of Friction
- Metatek
- · Replies 2 ·
Converting permeability constant from T·A/m to Gauss/EMU
- asdf1
- · Replies 3 ·
How Can I Calculate the Final Velocity of a Wagon on a Hill Using Physics?
- Izekid
- · Replies 3 ·
Calculate Velocity From Kinecitcal energy
- Izekid
- · Replies 6 ·
Amplitude of 3-kg Pendulum 2m Arc 21.4°
- ebola_virus
- · Replies 1 ·
Calculating Force & Impulse in Car Collision Situations
- Erik_at_DTU
- · Replies 1 ·
Simple EM Problem (not to me for some reason)
- FrogPad
- · Replies 4 ·
Some Mechanics Problems (Could someone verify my work?)
- amcavoy
- · Replies 13 ·
Hot air balloon and pellet collision altitudes
- Kandy
- · Replies 8 ·
Calculate Distance of Roof Above Window Top
- Kandy
- · Replies 1 ·
2.0 kg mass sliding down 30° frictionless incline
- IB
- · Replies 3 ·
Solve Drag Racer Coefficient of Static Friction
- yeyspaz
- · Replies 1 ·
How Do I Solve These Rotational Dynamics Problems?
- Gimp
- · Replies 5 ·
Conservation of Energy (Spring + Kinetic)
- IB
- · Replies 2 ·
Structural Features for Minimizing Earthquake Damage: What Are They?
- BBboy
- · Replies 2 ·
Why Does Spring Oscillate Horizontally?
- Atomos
- · Replies 5 ·
Why is initial velocity equal to final velocity for x-axis motion?
- Aspekt
- · Replies 1 ·
How Can Circular Motion Principles Solve Real-World Physics Problems?
- hshphyss
- · Replies 1 ·
Is Energy a Scalar or Vector? Understanding Energy and Work
- Werg22
- · Replies 2 ·
Where is the Center of Gravity of a Car Located?
- AdnamaLeigh
- · Replies 2 ·
Understanding Error Propagation in Repeated Measurements for Accurate Results
- finerty
- · Replies 9 ·
Calculating Bank Angle for Airplane Flying at 50ms^-1 with 300m Radius Turn
- Kenny Lee
- · Replies 2 ·
Determining Spring Constants in Different Gravity Environments
- polyperson
- · Replies 2 ·
Projectile Motion basketball shot
- kara1434
- · Replies 2 ·
Energy Absorbed by Ear from 95-dB Sound Wave
- helppppp
- · Replies 2 ·
Does Stretching a Slinky Affect Wave Speed?
- runicle
- · Replies 1 ·
(Newtons second law) One of the two problems I really need to solve this weekend
- Lisa...
- · Replies 18 ·
Solving Part (b) of Impulse Question Problem
- amcavoy
- · Replies 2 ·
Terminal velocity of a steel ball
- sueanne
- · Replies 7 ·
(Circular motion) The second problem I really need to solve this weekend
- Lisa...
- · Replies 10 ·
Vectors/Trigonometry Notation Problem
- lando45
- · Replies 1 ·
Angle for Impending Motion on Inclined Plane with Attached Blocks
- physicsss
- · Replies 7 ·
Torque Calculation for Restoring Angular Speed of Two Disks
- amcavoy
- · Replies 2 ·
Conservation of energy with friction and springs
- F.B
- · Replies 2 ·
Physics test retake: farad, atomic structure, house circuits, and atomic energy
- mrlobster@g-unit.com
- · Replies 3 ·
What is the initial speed of the bullet that hits the pendulum?
- joex444
- · Replies 2 ·
End correction in open-closed pipes: how does it affect wavelength?
- R7ll
- · Replies 1 ·
Finding the center of mass of a cone
- Moneer81
- · Replies 3 ·
Why does work equal the line integral of force?
- courtrigrad
- · Replies 2 ·
Scuba diver's lungs expanding from 10 m depth to surface
- Physic_Scholar
- · Replies 12 ·
How Do You Calculate Equivalent Resistance in Mixed Circuit Configurations?
- huskydc
- · Replies 1 ·
Block on block on table with hanging mass friction problem
- Lisa...
- · Replies 7 ·
Coursework on Projectile Motion
- Apoorva
- · Replies 5 ·
Can the passenger catch the train if the platform is long enough?
- cocoavi
- · Replies 4 ·
How to Determine Maximum Tension Before a Rubber Band Snaps?
- ~Josh [G]
- · Replies 3 ·
Optimal angle for maximum torque in a balancing torque problem
- Physics103
- · Replies 3 ·
Finding elevator acceleration when scale reads 0.72 of normal weight
- Sar06
- · Replies 2 ·
Angular momentum in a particle system
- Shadow Cloud
- · Replies 1 ·
How Does Newton's Second Law Explain Equilibrium and Changes in Apparent Weight?
- vinny380
- · Replies 1 ·
Arrow fired from bow and car kinetic energy percent increase
- thschica
- · Replies 3 ·
Calculating the Magnitude of an Object in Free Fall
- killer22
- · Replies 1 ·
Two Compressed Springs -> Unstable Equilibrium
- brentd49
- · Replies 5 ·
Calculating Torque and Force on Supports A and B
- Physics is Phun
- · Replies 2 ·
Spring fired marble distance needed
- joex444
- · Replies 2 ·
How Does Free Fall Affect Pepe and Babette's Midair Catch?
- Kandy
- · Replies 7 ·
Egg drop device that must bounce after horizontal toss
- briguy2188
- · Replies 1 ·
Calculating Angular Velocity of a Rotating Platform with Moving Mass
- Punchlinegirl
- · Replies 6 ·
Lenz's Law/Conservation of Energy
- KatieKangaroo
- · Replies 2 ·
Does a pendulum experience centripetal force?
- Werg22
- · Replies 7 ·
Calculate Gravity Using Pendulum Experiment
- Effitol840
- · Replies 3 ·
How much work is done on the crate by friction?
- courtrigrad
- · Replies 7 ·
Specific heat : solids and liquids
- airforce840
- · Replies 2 ·
Calculating Force and Angle on Incline Plane with Friction
- physicsss
- · Replies 16 ·
How Do You Determine the Direction of Coriolis Force?
- madking153
- · Replies 1 ·
How Do You Calculate the Instantaneous Power of a Car Engine?
- 404
- · Replies 1 ·
How Do You Calculate Equilibrium Torque for a Supported Girder?
- Ineedofhelp
- · Replies 1 ·
How Does Mass Influence the Velocity of the Center of Mass?
- something_about
- · Replies 1 ·
Why Does a Block Lose Contact with a Frictionless Sphere When Sliding Down?
- Lisa...
- · Replies 26 ·
Two Elastic/Inelastic Questions - Really Easy
- Dooga Blackrazor
- · Replies 3 ·
How do bicycles act as force multipliers?
- redXI
- · Replies 1 ·
Gravitational Potential Energy of astronaut
- Erwin Schrodinger
- · Replies 2 ·
Angular acceleration of spinning tire and washing machine tub
- hshphyss
- · Replies 1 ·
Why does a belt hanger with angled belt balance on a table edge?
- unctarheels1
- · Replies 4 ·
Center of mass calculation for attached problem
- jacy
- · Replies 7 ·
Why Do Objects with Different Mass Fall at the Same Time?
- Ahmadso
- · Replies 3 ·
Circular motion on a inclined plane
- Werg22
- · Replies 6 ·
Velocity and frame of reference question
- Pepsi24chevy
- · Replies 3 ·
Frequency of a simple pendulum and it's mass
- BBboy
- · Replies 3 ·
Finding distance to fish from echo time 0.483 s
- BBboy
- · Replies 1 ·
Tunnel through the center of the earth
- DarkWing
- · Replies 2 ·
Radiation Pressure: Solving for Magnetic Field
- jarfungus
- · Replies 1 ·
What Does Monochromatic Light Mean in Young's Double Slit Experiment?
- Ukitake Jyuushirou
- · Replies 6 ·
Centripetal force direction at the top of a ferris wheel
- Erwin Schrodinger
- · Replies 4 ·
What is the threshold for pain in decibels?
- bebe_boobs
- · Replies 5 ·
Thermal expansion of steel tape
- donjt81
- · Replies 6 ·
Finding emf and internal resistance from voltmeter readings
- Nabbsy88
- · Replies 1 ·
Tricky circular motion question
- Lisa...
- · Replies 4 ·
Explain how the "snap" of a wet towel is produced
- bebe_boobs
- · Replies 1 ·
How Does Momentum Conservation Apply in a Helicopter-Person System?
- something_about
- · Replies 3 ·
Structural features that minimize earthquake damage in buildings
- bebe_boobs
- · Replies 1 ·
Stress/strain/elongation question
- donjt81
- · Replies 2 ·
Moment of Inertia/angularvelocity question
- donjt81
- · Replies 6 ·