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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Y-component of Electrostatic Force
- vg19
- · Replies 1 ·
Finding electric field direction and charge for falling bead
- AdKo
- · Replies 16 ·
Why do we feel lighter when accelerating on a bike downhill?
- freswood
- · Replies 3 ·
Newton's second law with two objects
- xaer04
- · Replies 5 ·
Minimum force to slide a board out from under a box
- magasiki
- · Replies 1 ·
Calculating Charge and Tension in a System of Suspended Spheres
- awill2007
- · Replies 3 ·
Why is there no helicoptor with a single rotor?
- amberlyp
- · Replies 3 ·
Electric dipole charges/Electric Field
- AdKo
- · Replies 3 ·
Finding the centroid of a region bounded by y=sqrt(x) and the x-axis
- Bradracer18
- · Replies 1 ·
Max Lifting Potential on Earth vs. Moon
- freerider78
- · Replies 4 ·
What Does T Represent in Hockey Force Problems?
- freerider78
- · Replies 1 ·
How do the forces on block B affect its motion?
- Peach
- · Replies 5 ·
How Do Newton's Laws Apply to Weight Lifting?
- Peach
- · Replies 6 ·
Calculating Centripetal Acceleration and Force on Child
- natural
- · Replies 2 ·
How Do You Calculate the Distance of Sound Traveling Through Different Mediums?
- Boulderbison19
- · Replies 2 ·
Calculating Gravitational Potential Energy: A to B
- natural
- · Replies 2 ·
Calculating Frictional Energy Transformation in Satellite Reentry
- brunie
- · Replies 7 ·
Earth's orbital acceleration and net force from the sun
- natural
- · Replies 5 ·
Electric field and potential at the center of a square of point charges
- flamethrower20
- · Replies 12 ·
Momentum Concepts [Checking my Understanding]
- WolfishGrin
- · Replies 2 ·
Charge Distribution on a Conducting Hollow Tube
- stylez03
- · Replies 2 ·
Why Is My Calculation of Thermal Equilibrium Temperature Incorrect?
- crimesofparis
- · Replies 1 ·
Finding the third force when three spring scales on a force board are balanced
- freerider78
- · Replies 10 ·
Solving Kinetic Energy: How Do I Rearrange the Equation for Mass?
- thomas49th
- · Replies 4 ·
How Do I Calculate Stress, Strain & Young's Modulus?
- BIGEYE
- · Replies 2 ·
Solving Stopping Dist for Automobile w/ Coeff. of Kinetic Friction
- Peach
- · Replies 9 ·
Does hot water really freeze faster than cold water?
- Rocket_guy
- · Replies 2 ·
Two blocks on incline with different friction coefficients
- bassplayer142
- · Replies 9 ·
What is the work done by air resistance on a falling pilot?
- endeavor
- · Replies 7 ·
Calculating Stopping Distance Using the Work-Energy Theorem
- VinceStolen
- · Replies 4 ·
Finding direction of motion from position equations at t=0 and t=3.5
- Amria
- · Replies 2 ·
Angular Width of Electromagnetic Waves emerging from two buildings
- randyjstark
- · Replies 2 ·
Examples of Electric Field Lines
- AznBoi
- · Replies 5 ·
What is the magnitude of charge on each sphere?
- AznBoi
- · Replies 9 ·
Electric Field of a Spherical Shell: Sketching E vs. r
- kingwinner
- · Replies 3 ·
Why Don't the Electric Fields Match at the Boundary in Gauss's Law Calculation?
- kingwinner
- · Replies 4 ·
Phase Difference Problem, Ratio of I/Io
- Lemmy
- · Replies 1 ·
What is the Charge on the Styrofoam Ball in an Electric Field Experiment?
- jonno426
- · Replies 3 ·
Kirchhoff's Rules and Systems of Equations
- succubus
- · Replies 1 ·
How to Solve for Amplitude and Phase Constant in an Oscillation Problem?
- irvine752
- · Replies 4 ·
Checking answers for nested conducting shells with Gauss's law
- *best&sweetest*
- · Replies 4 ·
What are the Normal Mode Frequencies for a Hanging Rod's Vertical Oscillation?
- benij_chaos
- · Replies 3 ·
Understanding Centripetal Force on Rollercoasters
- AznBoi
- · Replies 4 ·
Newton's law and forces on the elevator
- FaNgS
- · Replies 17 ·
How can I get started with classical mechanics and solve difficult problems?
- bit188
- · Replies 24 ·
Solving for Initial Speed and Time in Projectile Motion
- xsc614
- · Replies 2 ·
How to calculate damage in a car crash simulation with reinforced doors
- kimlambiguit
- · Replies 3 ·
How Do Capacitors Affect Charging Time in a Circuit?
- fiziks1
- · Replies 2 ·
How Is the Sensitivity of a Ballistic Galvanometer Determined?
- Amith2006
- · Replies 1 ·
How Do I Calculate the Electric Field of a Charged Copper Plate?
- kingwinner
- · Replies 5 ·
Calculating Friction and Velocity for a Slowing Object
- Peach
- · Replies 6 ·
How Much Heat Does the Range Element Transfer in an Isovolumetric Process?
- interXdragon
- · Replies 3 ·
Find Net Electrical Force of Electrons on Proton
- merlos
- · Replies 3 ·
Amplitude, frequency, and energy?
- Stert
- · Replies 1 ·
Proton's Closest Approach to Mercury Nucleus
- dtesselstrom
- · Replies 6 ·
How Do You Calculate the Electron's Energy in the Bohr Model?
- Soaring Crane
- · Replies 1 ·
Are Tensions Represented as Unit Vectors in Physics Problems?
- suspenc3
- · Replies 1 ·
Standing wave velocity for string with 100 Hz oscillator and 5 segments
- stylez03
- · Replies 1 ·
Vehicle reversing with 9.8 m/s² and two objects thrown upward
- elton_fan
- · Replies 9 ·
Magnetic flux through a solenoid problem
- Amith2006
- · Replies 2 ·
Sprinter acceleration distance in 50-meter race
- elton_fan
- · Replies 5 ·
How Does an Imperfect Spring Affect the Velocity of a Released Ball?
- endeavor
- · Replies 1 ·
Calculating Turn Time for a Banked Airplane
- ataglance05
- · Replies 7 ·
Resistance due to temperature change
- xxkylexx
- · Replies 1 ·
Calculating # of Electrons in a Ping-Pong Ball w/ Charge of 3.2x10-5C
- AaronLosAl
- · Replies 1 ·
How Do You Calculate the Couple in a Force-Couple System at Point O?
- Bradracer18
- · Replies 3 ·
Equipotential Lines and field mapping
- demode
- · Replies 3 ·
Finding maximum height and initial velocity for thrown balls
- moshilover
- · Replies 1 ·
Speed in still water/ throwing object horizontally.
- future_vet
- · Replies 5 ·
Solving the Sliding Rod Equilibrium Problem on a Wall
- daniel_i_l
- · Replies 2 ·
Amplitude of Sinusoidal Motion for 0.269 kg Mass on 80.3 N/m Spring
- bebop721
- · Replies 1 ·
Friction force on 2.5 kg block with horizontal and vertical forces
- namit05
- · Replies 7 ·
Standing Wave Frequencies in Wire & Pipe: Similarities & Differences
- PremedBeauty
- · Replies 1 ·
How is the construction of an ac ammeter different from an dc ammeter
- Vagrant
- · Replies 2 ·
Finding final velocity after 2D collision between two objects
- delfick
- · Replies 14 ·
What Is the Amplitude of the Third Harmonic in a 200kHz Square Wave?
- bengaltiger14
- · Replies 1 ·
Fuse Wire Length and Capacity: A Discussion
- Vagrant
- · Replies 2 ·
Charge on capacitors C₁, C₂, C₃ in 18V circuit
- huh
- · Replies 12 ·
Pair production photon electron problem
- kreil
- · Replies 9 ·
How Do You Calculate the Output Power of a Laser After Multiple Adjustments?
- stunner5000pt
- · Replies 1 ·
What does p represent in Kepler's third law equation?
- aerogurl2
- · Replies 1 ·
Current/Voltage relationship for a filament lamp?
- Diamond Dog
- · Replies 10 ·
Converting (having major trouble)
- BunDa4Th
- · Replies 5 ·
What type of polarizing lens minimizes glare from reflective surfaces?
- MattsVai
- · Replies 10 ·
What Is the Weight of a Spherical Metal Object If Made of Pure Gold?
- missequivocal
- · Replies 9 ·
Period of circular motion given centrifugal force and radius
- blackice552
- · Replies 4 ·
Understand the momentum and velocit
- aerogurl2
- · Replies 2 ·
Pressure Variation on spacecraft
- Bradracer18
- · Replies 14 ·
Solving Variable Resistance Circuit: Ohm's Law
- Warrzie
- · Replies 3 ·
How Much Energy Is Required to Convert Ice at -13°C to Steam at 113°C?
- Aikenfan
- · Replies 5 ·
Centripetal acceleration of electron in Bohr hydrogen atom
- Newton122
- · Replies 2 ·
How Does Adding Particles Affect Entropy in a Multi-Level Energy System?
- HalfManHalfAmazing
- · Replies 3 ·
Why does a current-carrying wire melt in the middle?
- complications07
- · Replies 9 ·
Where does (372.15 - 293.15) come from in the tin heat capacity problem?
- Aikenfan
- · Replies 3 ·
Elastic collision between identical shuffleboard pucks at angles
- sskk221
- · Replies 1 ·
What Is the Center of Mass for a Rod with a Sphere Attached?
- FizzixIzFun
- · Replies 1 ·
Using a water tank's weight to compress air in a cylinder
- mrwaustin
- · Replies 1 ·
Problem with Classic where do they meet Problem
- derekfuselier
- · Replies 11 ·