Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Threads
What Are the Final Velocities in a Perfectly Elastic Collision Problem?
- southernbelle
- · Replies 3 ·
Calculating Speed of Mass Oscillating on Spring
- veitch
- · Replies 3 ·
Rotational Motion/Pulley Problem
- mburt3
- · Replies 5 ·
Rearranging g = w/ft to make w the subject
- snakey
- · Replies 4 ·
Rotational Energy Homework - Calculate Moment of Inertia & KE
- bkl4life
- · Replies 1 ·
Bernoulli's equation and a water tank
- notagenius08
- · Replies 7 ·
How does a lettuce spinner remove water from lettuce?
- bkl4life
- · Replies 4 ·
How Can Particle Trajectory and Motion Dynamics Be Analyzed in a Planar System?
- jackiemoon
- · Replies 1 ·
Why do polished glass surfaces stick together briefly?
- AirHendrix
- · Replies 5 ·
Can't all electromagnetic waves travel at light speed?
- Diagon
- · Replies 1 ·
Why Is Cosine Used Instead of Sine in Calculating Tension in Physics?
- -EquinoX-
- · Replies 1 ·
Determine angle for gun to be shot at
- mmn
- · Replies 2 ·
Minimum speed on banking road (circular motion)
- Elbobo
- · Replies 5 ·
What is the minimum force needed for a syringe to deliver serum into a patient?
- RafaFutbol
- · Replies 9 ·
What is the Specific Heat of My Alloy?
- kait
- · Replies 2 ·
Two Dogs and a Tire: A Physics Experiment
- RZA
- · Replies 2 ·
Work-Energy theorem and kinetic energy pertaining to a car
- DMOC
- · Replies 4 ·
Thermodynamics: Adiabatic Process and Changes in Volume and Pressure
- joe215
- · Replies 2 ·
Finding the Cross Product of A and B: A Puzzling Answer?
- -EquinoX-
- · Replies 3 ·
What Minimum Height Must the Sides of a Steel Boat Have to Float?
- aa1515
- · Replies 2 ·
Torque direction using right hand rule
- -EquinoX-
- · Replies 2 ·
Elastic Potential Energy of a Spring Between 2 Blocks
- mac31905
- · Replies 5 ·
Temperature of Pluto's Atmosphere
- viviolet
- · Replies 1 ·
Heat/First Law of Thermodynamics/Calorimetry - Have work done
- maniacp08
- · Replies 1 ·
How Many Beers Does It Take to Reimburse Energy Expenditure?
- nns91
- · Replies 6 ·
Static Equilibrium of a tree sapling
- Bones
- · Replies 2 ·
Gravity in a uniform density sphere and a shel
- musicfairy
- · Replies 3 ·
Acceleration of mass on a spring
- futurept
- · Replies 3 ·
How to Find a Skateboarder's Speed Down an Inclined Ramp?
- Vaalron
- · Replies 1 ·
Tyrolean traverse rope sag with safety factor
- SMA83
- · Replies 2 ·
Torque and netwon's second law: True or false question
- alpha372
- · Replies 1 ·
Thermodynamics involving rods and heat transfer with conduction
- goodiegrady
- · Replies 1 ·
Time for a micro-wave to travel a distance
- rebeccc
- · Replies 11 ·
Do Friction Forces Have Units?
- AirHendrix
- · Replies 6 ·
Find amplitude, wave speed, and nodes from standing wave equation
- matt62010
- · Replies 1 ·
How Do Sinusoidal Waves Interfere to Form a Resultant Wave?
- matt62010
- · Replies 1 ·
Electric field caused by a uniform linear charge
- gotem3303
- · Replies 1 ·
Circular Motion and Friction on an amusement park ride
- DMOC
- · Replies 9 ·
Collision, Bullet fired into block of wood
- synergix
- · Replies 7 ·
Simple Harmonic Motion of a machine part problem
- veronicak5678
- · Replies 3 ·
Elastic collision, frictionless surface
- synergix
- · Replies 5 ·
Significant Figures: Do Instructors Require Them?
- Elbobo
- · Replies 1 ·
Angular acceleration when wheel rotates on rotating turntable
- p21bass
- · Replies 13 ·
Answer Check: Displacement Currents and Capacitors
- TFM
- · Replies 1 ·
Calculating Orbital Time of Sun with Average Radius of 2.5*1025 km
- jawo3
- · Replies 2 ·
Minimum Radius of Space Habitat to Maintain <1/100g Variation
- NateTheGreat
- · Replies 1 ·
Weight Density and Mass Density
- GreenEyedGal3
- · Replies 4 ·
Astronaut traveling what effects would she feel?
- goWlfpack
- · Replies 5 ·
Torque and equilibrium; concept problem
- alpha372
- · Replies 2 ·
Relativity and observed length of a moving object
- goWlfpack
- · Replies 6 ·
Kinetic Energy of tennis ball drop
- lenbc2006
- · Replies 3 ·
What is the Time Read by a Moving Clock in Basic Relativity?
- DukeLuke
- · Replies 6 ·
Answers to Physics Questions: Temperature, Range, Forces, Spillage, and Speed
- lenbc2006
- · Replies 1 ·
Friction force on a rolling ball
- jimbo71
- · Replies 2 ·
Capacitor Circuit (Capacitor as source)
- mtbhrd
- · Replies 4 ·
Angular speed when a spinning disk reaches pure rolling
- mburt3
- · Replies 5 ·
Partial Pressure question (should be easy to answer)
- dlw902
- · Replies 2 ·
Rotation kinetic energy/linear velocity
- jimbo71
- · Replies 4 ·
How can I solve these physics problems involving torque and rotational energy?
- Max CR
- · Replies 8 ·
Impulse on ball involving angles
- AdamNailor
- · Replies 9 ·
Is the answer for (3 + i) / (6 - i) correct?
- elie_girl
- · Replies 5 ·
What are the velocities of the carts after a perfectly elastic collision?
- southernbelle
- · Replies 2 ·
How Does River Current Affect Boat Speed and Crossing Time?
- Inertialforce
- · Replies 2 ·
Mass momentum of inertia in lab, error analysis
- Regel
- · Replies 4 ·
Calculating Work Output from Thermal Efficiency of Car Engine
- WhyPrime89
- · Replies 1 ·
Gravitational Field problem Question
- jessedevin
- · Replies 4 ·
How Does the Position on a Turntable Affect a Mass's Acceleration?
- jimbo71
- · Replies 1 ·
What do photons carry information about?
- cap.r
- · Replies 3 ·
What Is the Volume of a Gas Bubble Just Beneath the Surface of Mercury?
- greyknight
- · Replies 6 ·
Rotation Problem/Total Kinetic Energy
- mburt3
- · Replies 1 ·
What Is the Correct Value for k in the Latent Heat Equation?
- jcpwn2004
- · Replies 1 ·
How Do You Calculate the Electric Field to Suspend a Proton?
- EtherMD
- · Replies 3 ·
Angular Momentum: Rod on Rotating Disk
- nastassja
- · Replies 2 ·
Physics Free Body Diagram Question
- bengalkitties
- · Replies 1 ·
How Does Tension Vary in a Simple Pendulum?
- bocobuff
- · Replies 1 ·
How Do You Calculate Displacement and Time of Flight When Sliding Off a Roof?
- Inertialforce
- · Replies 1 ·
Finding spring constant for water balloon launcher range
- mcca408
- · Replies 5 ·
Free body diagram for pendulum at 30 degrees amplitude
- -EquinoX-
- · Replies 9 ·
Billiard ball rolls with slipping to without slipping.
- alphaJA
- · Replies 15 ·
Spring compression after inelastic collision of two blocks
- BC2210
- · Replies 9 ·
Solve for Acceleration at Point B in a Rod on a Frictionless Surface"
- saltine
- · Replies 6 ·
Kinetic Energy/Velocity Relationship
- bmyer
- · Replies 1 ·
How would i find the coefficient of sliding friction
- meredith
- · Replies 1 ·
Find work done by each of the forces.
- wadesweatt
- · Replies 6 ·
What is the lowest frequency for a microphone interference maximum?
- rsu
- · Replies 1 ·
Steel guitar string: max length, min radius, and fundamental frequency
- anubis01
- · Replies 13 ·
How Long Does It Take for the Planet to Complete One Rotation?
- jromega3
- · Replies 11 ·
Rolling Without Slipping/Loop Problem
- mburt3
- · Replies 8 ·
Fission Reaction Energy Calculation
- s_stylie0728
- · Replies 2 ·
Energy and Circular Motion Problem
- sinequanon
- · Replies 2 ·
Calculating Angle in Two-Slit Experiment with High-Speed Protons
- nnof55
- · Replies 3 ·
Spring constant with given mass, find Work
- BC2210
- · Replies 2 ·
How High is the Watermelon When Its Kinetic Energy is 4.61J?
- soccerplaya09
- · Replies 1 ·
Tension in string with hanging mass and sliding block
- Mindstein
- · Replies 1 ·
What is the resultant magnitude and direction of three perpendicular forces?
- ghostanime2001
- · Replies 6 ·
Physics Home Work: Coefficient of Friction Requirement
- #CW!!ZERO
- · Replies 2 ·
Harmonic motion whose damping is not related to velocity
- fdsadsfa
- · Replies 1 ·
Why Can't Brass Rods Be Charged by Rubbing?
- perjogab
- · Replies 2 ·
Photons per second hitting an aperture
- SammC
- · Replies 1 ·
How Do You Calculate Angular Momentum for a Swinging Bob?
- mburt3
- · Replies 3 ·