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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First HW - Two firecrackers explode at the same place in the lab
- crazyapeguy
- · Replies 1 ·
Sign Convention for Work Done by Varying Force
- misterpugsly
- · Replies 21 ·
How Far Can a Person Walk on a Plank Before It Tips?
- BrainMan
- · Replies 7 ·
After two time constants of time have elapsed, the current in the circ
- TravisBoyd
- · Replies 3 ·
Bouyant Force in a U Shaped Plastic Tube
- chillpenguin
- · Replies 1 ·
If the loop is rotated in the opposite direction by the same amount, w
- TravisBoyd
- · Replies 1 ·
Can somebody me with this problem
- CougarPride
- · Replies 2 ·
Coulomb's Forces triangle of charges
- pumpernickel
- · Replies 13 ·
Torque; where to place axis (levers) question.
- CougarPride
- · Replies 1 ·
Need Help with a Triangular Loop Problem?
- sfgoat
- · Replies 3 ·
Increasing Energy & Wealth: How to Maximize kWh/O,4$/Year/Person
- Donna14
- · Replies 3 ·
Calculating magnetic force between two bar magnets
- Ascendant78
- · Replies 4 ·
K&K Question 3.22 - Mass, String, and Ring
- Radarithm
- · Replies 9 ·
Why is the restoring force for SHM of liquid in a U tube 2pAgx?
- coconut62
- · Replies 1 ·
Topspin for a tennis ball to not change velocity while bouncing
- mintsnapple
- · Replies 1 ·
Finding Center of Mass of a Nonuniform Bar
- chongkuan123
- · Replies 10 ·
How Does Coil Rotation Affect Magnetic Flux and EMF Generation?
- patrickmoloney
- · Replies 3 ·
Solve for v2Plutonium-239 Decay: Find Speed of Uranium-235
- negation
- · Replies 4 ·
What is the radius of the circular arc if the accelerating potential is tripled?
- googlyeyes
- · Replies 1 ·
Thermodynamics - change in internal energy of the system for the path
- Ronaldo95163
- · Replies 5 ·
Block Sliding Down Inclined Plane with Pulley and Friction
- sreya
- · Replies 5 ·
Energy and oscillations combined
- notabigfan
- · Replies 6 ·
Magnetic field due at a point due to a wire outlining an ellipse
- Duderonimous
- · Replies 1 ·
What is the Phase Constant in an Inelastic Collision with a Spring?
- notabigfan
- · Replies 8 ·
Angular momentum of time dependent particle motion
- Schulze
- · Replies 9 ·
Balancing a plank on springs (Torques)
- notabigfan
- · Replies 7 ·
Gravitational Acceleration given mass and radius
- EliteCodexer
- · Replies 3 ·
Current drawn by a motor operating at half speed
- BOAS
- · Replies 4 ·
Force of interaction between caps
- Saitama
- · Replies 34 ·
Zero Potential and Electric Intensity in a 2D Plane with 3 Point Charges
- Lucky7
- · Replies 4 ·
Oil drop experiment electron charge
- omega500
- · Replies 7 ·
Thermodynamics Cycle of Processes
- liamporter1702
- · Replies 2 ·
How Do Electric Fields Affect Electron Motion Between Charged Plates?
- patrickmoloney
- · Replies 4 ·
Hydrogen atom emitting a photon
- STJ
- · Replies 1 ·
Entropy of a mole of a crystalline solid as a function of temperature
- NobodyMinus
- · Replies 1 ·
Eccentrically hollow cylinder - Lagrangian (external forces)
- widelec
- · Replies 2 ·
How Is the Mass of the Top 3.2 Meters of the Ocean Calculated?
- Smazmbazm
- · Replies 6 ·
Drag Force - Air Resistance Question
- patrickmoloney
- · Replies 1 ·
How Does Inductance Affect DC Circuit Behavior?
- jimmy4
- · Replies 8 ·
Elastic potential energy of a hanging cone
- Saitama
- · Replies 16 ·
Find Current in RC Circuit w/ V=Vo Sin(ωt)
- TheEvenfall
- · Replies 2 ·
FBD of Block: Real-Life Example and Equations
- tmobilerocks
- · Replies 19 ·
Electric Potential of a Spherical Shell
- asap9993
- · Replies 6 ·
K&K Question 3.5 - Mass and Axle
- Radarithm
- · Replies 26 ·
Short webpage title: Calculating Moments of Inertia and Magnetic Moment
- besnik93
- · Replies 3 ·
How Do Newton Rings Help Calculate Lens Curvature?
- bondgirl007
- · Replies 3 ·
Find angular velocity given velocity of attached block
- grekin
- · Replies 1 ·
How Do Spring Constants Affect Harmonic Motion Periods and Frequencies?
- amasu
- · Replies 5 ·
Electric field intensity with a charge decreasing over time
- ForTheGreater
- · Replies 1 ·
Wave function in infinite square well, with potential step
- slasakai
- · Replies 1 ·
Solve Kirchhoff's Law: Find I1, I2 & I3
- sammblehh
- · Replies 2 ·
How do mass affect the acceleration of a pulley?
- boii
- · Replies 3 ·
How to Determine Focal Length and Power of Lenses for Farsightedness
- physicsztudent
- · Replies 1 ·
Magnetic Field between two plates
- Jgamita10
- · Replies 1 ·
Calculating Distance Given Work and Forces
- Natko
- · Replies 2 ·
Angular Acceleration of a Fixed Rod
- Schulze
- · Replies 11 ·
Calculating Bungee Cord Stretch: Mass, Length, and Stiffness Formula
- patrickmoloney
- · Replies 1 ·
Magnetic field and conducting rails
- BOAS
- · Replies 1 ·
Ball rotates around a shaft by two cords
- mackeis
- · Replies 3 ·
A block on a frictionless circular ramp
- killthelights1
- · Replies 5 ·
Solve Magnetic Field & Energy Between 2 Equally Magnetized Plates
- Jgamita10
- · Replies 1 ·
Two cars collide and fuse together
- killthelights1
- · Replies 1 ·
Help: Photoelectric effect problem
- kas8
- · Replies 13 ·
What is the average power if the resistance R is doubled in an AC circuit?
- Coop
- · Replies 3 ·
Asteroid on course with planet problem
- jj975
- · Replies 1 ·
Coil & Generator Homework: Solve for Current & Reactance
- Flop880
- · Replies 3 ·
What Is the Correct Prescription Power for Hyperopia to Read at 56.3 cm?
- blue_lilly
- · Replies 1 ·
Kirchhoff's Rules: Circuit Question
- navm1
- · Replies 7 ·
Quantitative observations of Pandora cluster
- rstein66
- · Replies 1 ·
Self Inductance of a Solenoid Problem
- liamporter1702
- · Replies 1 ·
Calculating Forces on an Electric Dipole: Direct vs. Indirect Methods
- physiks
- · Replies 7 ·
Analyzing Momentum and Speed in Billiard Ball Tracks
- physicos
- · Replies 11 ·
Time the Earth requires to go towards Pluto?
- Theivax
- · Replies 2 ·
Lagrange qustion, a partilcle confined to a spherical cone
- mjmontgo
- · Replies 2 ·
Collision - a ball and string form a pendulum
- ron360
- · Replies 10 ·
Buoyancy, depth a block will sink in two different liquids
- TheKShaugh
- · Replies 16 ·
Can a shear force diagram be a function of applied load P?
- annas425
- · Replies 3 ·
Understanding Refraction and Reflection in Silvered Lenses
- dhtikna
- · Replies 2 ·
Conservation of energy/momentum
- alyssaxo
- · Replies 1 ·
What is the total mechanical energy of a particle falling on an extended string?
- Jessica8956
- · Replies 7 ·
What is the magnitude of the impulse
- alyssaxo
- · Replies 1 ·
What is the value of these angles ?
- yoxter
- · Replies 5 ·
Kinematics Question -- 2 Runners Racing Each Other
- yoyo16
- · Replies 2 ·
Need help with Physics problem (momentum/collisions)
- Engineering100
- · Replies 7 ·
Conservation of energy with a bungee jumper
- lordbolton
- · Replies 8 ·
Cylinder rolling inside a moving pipe
- CAF123
- · Replies 21 ·
Apparent weightlessness problem?
- toothpaste666
- · Replies 17 ·
What is the frequency of light with a wavelength of 7.245×10−7 m in glass?
- elitepro
- · Replies 1 ·
Solving Current in a Cell: Use I = V/R to Find 2/3
- calculator20
- · Replies 4 ·
Solving Forces in Structures: Eliminating Members & Calculating Forces
- MMCS
- · Replies 5 ·
Maximun power delivered to a resistor
- tadm123
- · Replies 6 ·
What are the non-zero moments for a pure dipole?
- moongate
- · Replies 1 ·
Why is the acceleration not equal to 9.81 m/s^2
- rexorsist
- · Replies 7 ·
Clarifying Torque, RPM, and Radius in Motor Dynamics
- SpaceLight
- · Replies 6 ·
Rotate object in space to direction [Simulation]
- HateDread
- · Replies 9 ·
Solution to Gravitation Problem - Third Mass on Perpendicular Bisector
- toothpaste666
- · Replies 6 ·
Kinematics and Work-Energy problem with skier
- alingy2
- · Replies 4 ·
Will Current Flow Through a Rotating Copper Wire Loop in a Magnetic Field?
- oakles
- · Replies 1 ·
Capacitor. Find thickness of polystyrene
- owtu
- · Replies 1 ·
Qualitative Explanation of Range
- tmobilerocks
- · Replies 1 ·