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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Why do the electric field directions of opposite charges align in the middle?
- phy77
- · Replies 2 ·
Where Should the Third Particle Be Placed for Desired Center of Mass?
- AnkhUNC
- · Replies 10 ·
Inelastic Collision and Pendulums
- seichan
- · Replies 2 ·
Relationship between acceleration and slope
- leftyguitarjo
- · Replies 4 ·
What Determines the Direction of an Electric Field?
- phy77
- · Replies 1 ·
Conservation of Energy With Loss Due to Friction
- seichan
- · Replies 6 ·
Two protons moving toward each other
- rkjul
- · Replies 7 ·
Determining Electron Motion in Electric Field
- Speny
- · Replies 2 ·
Charge Distribution Between Two Conducting Spheres
- Gear300
- · Replies 2 ·
Finding current from battery with capacitor in circuit
- amolv06
- · Replies 1 ·
Final Angular Velocity of a Top
- damedesfeuers
- · Replies 2 ·
Finding the Net Force on a Rectangular Loop in a Magnetic Field
- GreenLantern674
- · Replies 3 ·
Calculating Wavelength of Electron Emission
- Air
- · Replies 4 ·
Why Is Frictional Force Less Than Weight on an Inclined Plane?
- StephenDoty
- · Replies 4 ·
Ballistic Pendulum: Bullet Impact at 500m/s
- rsala
- · Replies 4 ·
How Does Superposition Principle Apply to Forces in a Three-Charge System?
- wiskeywiz
- · Replies 2 ·
Using electric force to calculate number of protons
- dizzydani
- · Replies 4 ·
How Is Work Calculated When Changing Orbital Radius in an Electric Field?
- jperk980
- · Replies 2 ·
Minimum charge needed to support a 4 kg chicken with electric field
- Lalitha
- · Replies 11 ·
Spring/Incline plane kinematics/work problem
- Shadowsol
- · Replies 2 ·
Direction of the Magnetic Field due to a Wire
- cse63146
- · Replies 4 ·
Vector components - change in momentum
- studypersist
- · Replies 1 ·
Find the force on each side of the loop
- Roze
- · Replies 1 ·
Finding velocity after 10 seconds with two different accelerations
- Cursed
- · Replies 1 ·
How Do You Calculate the X-Component of Force from Potential Energy?
- sracks
- · Replies 5 ·
Uniform circular motion centripetal force experiment
- gavrir
- · Replies 1 ·
Work/force/kinematics slingshot problem
- Shadowsol
- · Replies 3 ·
Solving Tension Acceleration in Bungee Jump Apparatus
- mshah3
- · Replies 9 ·
Rotational Kinetic Energy of bicycle wheels
- rugbygirl
- · Replies 3 ·
Solving Thin-Film Problem with Wavelengths 690 and 575nm
- judonight
- · Replies 2 ·
How far from the table does the block hit the floor?
- rugbygirl
- · Replies 3 ·
Energy, power, and electric field in toaster, electron gun, and spark problems
- tachu101
- · Replies 1 ·
Calculating the Reading on Newton Meter with 3 Kg Masses
- temaire
- · Replies 19 ·
Physics Motion Problem (Displacement)
- lp03269
- · Replies 1 ·
Average speed with an unknown distance
- yorick
- · Replies 2 ·
Determining current and drift speed
- octahedron
- · Replies 1 ·
Current through a hollow copper cylinder
- Ellesar
- · Replies 4 ·
Calculating the Height of a Window Using Kinematic Equations
- Sorry!
- · Replies 1 ·
Circular Motion and Centripetal Force
- gavrir
- · Replies 2 ·
Rank Pendulums Based on Max Speed
- Duckboy
- · Replies 2 ·
Integrating a Polynomial with Fractional and Negative Indices
- _Mayday_
- · Replies 9 ·
How do you calculate the distance between two astronauts playing catch in space?
- strykker5400
- · Replies 11 ·
Does a marble convert all potential energy to kinetic energy rolling down a ramp?
- missphysics12
- · Replies 3 ·
How Does Air Resistance Affect Cyclist Power Output?
- jk5389
- · Replies 3 ·
Calculating Wood Friction on Metal: Solving for Time
- vanquish
- · Replies 3 ·
Question Regarding Electric Fields
- cardinalboy
- · Replies 3 ·
I can't seem to figure out how to start this
- username2
- · Replies 2 ·
Calculate Total Collisions of Free Electrons in Extension Cord
- fubag
- · Replies 3 ·
When is back coating on plane mirrors undesirable?
- Jeng
- · Replies 1 ·
Roller coaster speed at bottom of 50m hill with friction
- peaches1221
- · Replies 7 ·
Troubleshooting Integration for Particle Probability in an Infinite Well
- dangsy
- · Replies 4 ·
The magnitude and the resultant vector
- chocolatelover
- · Replies 1 ·
What is the Energy Required to Move an Electron Between Two Charged Spheres?
- ambull
- · Replies 1 ·
Kate's Bungee Jump: Calculating Distance Below Bridge
- rsala
- · Replies 3 ·
Magnetic field from two parallel wires 4 cm apart
- cemar.
- · Replies 1 ·
Desperately on potential energy problem
- rasgar
- · Replies 16 ·
Coulomb's Law and electron placement
- soul5
- · Replies 4 ·
Work on object lifted in a gravational field
- sracks
- · Replies 5 ·
Conservation of angular momentum on low-friction bearings
- Seraph404
- · Replies 4 ·
Energy and power dissipated in a toaster
- alligrass
- · Replies 9 ·
Electric potential/electric fields
- alligrass
- · Replies 4 ·
Why are destructive interference frequencies odd multiples, not even?
- Shakas
- · Replies 2 ·
Pyrex glass rod is immersed into wesson oil
- henry2221
- · Replies 3 ·
Finding the magnitude and the angle
- chocolatelover
- · Replies 7 ·
Finding the graphical method for inverse proportional relationship
- heathphysics
- · Replies 1 ·
Finding angle and magnitude of vector sums with unit vectors
- chocolatelover
- · Replies 6 ·
How Do Magnetic and Gravitational Forces Affect Electron Acceleration?
- j91621
- · Replies 2 ·
Solving for t in SHM (complex solution)
- mouser
- · Replies 4 ·
Speed and accleration of a turntable
- clope023
- · Replies 1 ·
What does height of a mercury column mean?
- JWHooper
- · Replies 4 ·
How Deep Is the Lake and What Is the Initial Velocity of the Ball?
- lgen0290
- · Replies 1 ·
Calculating Conical Acceleration for a Rotating Object on a Table
- teresat628
- · Replies 1 ·
Measuring Reaction Time with a Simple Device
- lgen0290
- · Replies 5 ·
Calculating Bird Airspeed from Ground and Wind Speed
- KLB
- · Replies 1 ·
Universal Gravitation and magnitude
- Dgolverk
- · Replies 4 ·
How Does Electron Movement Affect Magnetic Fields in a Hydrogen Atom?
- cryptoguy
- · Replies 1 ·
Calculating orbital parameters for Mars orbit insertion
- rsyodoom2005
- · Replies 1 ·
Change in Electric Potential Across R1 in Figure B
- daimoku
- · Replies 4 ·
What is the force on the exerted edge of the cap
- pauln
- · Replies 4 ·
How Do I Find the Force of Friction for My Lab Report?
- Nabik33
- · Replies 1 ·
Football Players: Solve Sliding Distance After Collision
- Nightrider55
- · Replies 5 ·
How is Gravitational Potential Calculated on the Moon's Surface?
- Pho3nix
- · Replies 1 ·
What is the final temperature of water when ice is added to it?
- SlickNick0013
- · Replies 4 ·
How does this battery-circuit system work?
- Gear300
- · Replies 6 ·
How Do You Calculate Flux Through a Box with Varying Electric Fields?
- Jim Newt
- · Replies 3 ·
Constructive and destructive interefernec and a pair of speakers
- TFM
- · Replies 4 ·
How Do You Calculate the Semi-Minor Axis for a Spacecraft's Orbit?
- rsyodoom2005
- · Replies 1 ·
What is the Current Generated by a Single Electron in Uniform Circular Motion?
- tony873004
- · Replies 2 ·
Why does adding resistance change induced voltage in a pendulum coil?
- Flame666
- · Replies 3 ·
Electric Potential (Why the opposite sign?)
- PFStudent
- · Replies 5 ·
How Do You Calculate Current and Voltage in Series and Parallel Circuits?
- tony873004
- · Replies 2 ·
Horsehoe Bats, Insects, Speed and the Doppler Effect
- TFM
- · Replies 6 ·
How Much Steam Is Needed to Melt Ice into Water at 20 Celsius?
- engineer2010
- · Replies 1 ·
Why consider only one mass in S.H.M. problems
- mysqlpress
- · Replies 8 ·
Hi and point charge vector question
- Jim Newt
- · Replies 3 ·
Lenses - Thin-Lens Equation and Magnification Equation
- missmia
- · Replies 2 ·
Difficult kinematics/power question
- Shadowsol
- · Replies 4 ·
Calculating Final Velocity for a Dropped Golf Ball
- maca_404
- · Replies 3 ·
Rotational Motion Force Question
- mits08
- · Replies 2 ·
Conservation of Energy and frictionless pulley?
- Eukanuba863
- · Replies 6 ·