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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Understanding Shear and Bending Moments in Beam Analysis
- jofree87
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Rotation problems: pure rotation, angular velocity, torque, and rolling
- cupid.callin
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Calculate Magnetic Field Strength for Deflecting Electron in CRT?
- m84uily
- · Replies 1 ·
Circular Motion, only radius known
- zz227
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Find moment of Inertia from Force, radius and acceleration
- iva
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Statics question: when do I need to find the support reactions?
- denting
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Current in a Network of Resistors
- cbb12
- · Replies 2 ·
Two connected masses on separate inclines
- alex12342011
- · Replies 20 ·
Why does the impulse equal 2.8 when a moving tennis ball is hit back?
- ProPM
- · Replies 2 ·
Physics Test Question, Electromagnetism (induced charges) (grade 12)
- baller2353
- · Replies 3 ·
Two ramps, one friction, one frictionless
- page123
- · Replies 17 ·
Maximum height and acceleration of a jumping flea
- MozAngeles
- · Replies 5 ·
How to Calculate Average Power of a Train Pulling an Object on a Slope
- mistabry
- · Replies 1 ·
Voltage drop across a resistor in a circuit
- pcml100
- · Replies 4 ·
Harmonic Infrared Wave Propogation
- zorro
- · Replies 6 ·
How Do I Calculate the Acceleration of a System with 3 Masses and 2 Pulleys?
- gob_b
- · Replies 23 ·
What is the work done by kinetic friction on a desk pushed on a rough surface?
- d.tran103
- · Replies 2 ·
How Does Angular Momentum Conservation Apply to Rotational Systems?
- cupid.callin
- · Replies 3 ·
Rotation - Friction on Rolling Sphere
- cupid.callin
- · Replies 2 ·
EMI - Current in solenoid due to magnet
- cupid.callin
- · Replies 1 ·
Kinematics - Finding position and acceleration
- MozAngeles
- · Replies 2 ·
Why Does My Ideal Gas Formula Derivation Not Include Moles?
- PeterPoPS
- · Replies 3 ·
I really don't understand Kirchhoff's Law
- flyingpig
- · Replies 42 ·
Gravitational Tension forces on a moon and a planet?
- anonsify
- · Replies 1 ·
Max Load for Beach Mattress on Dead Sea Surface: 142.8 kg
- chawki
- · Replies 1 ·
Inertia, rigid body motion and angular momentum problem
- raphre
- · Replies 1 ·
Friction and Forces. (mcq questions)
- s200960170
- · Replies 17 ·
How Much Force Is Needed to Prevent the Smaller Block from Slipping?
- dorkymichelle
- · Replies 7 ·
Calculating Percentage Uncertainty in Gradients
- gii
- · Replies 4 ·
Loop-the-loop on frictionless track, spring-powered
- fysics4liefe
- · Replies 4 ·
Calculating Electric Flux Through a Non-Uniform Hemispherical Surface
- Abhishekdas
- · Replies 2 ·
EMI - current direction in loop
- cupid.callin
- · Replies 2 ·
Is There an Electric Field Inside a Cylindrical Conductor with a Steady Current?
- Abhishekdas
- · Replies 2 ·
Barometer reading in an elevator .
- Abhishekdas
- · Replies 6 ·
Ranking airplane wing lift from pressure difference and area
- LoveKnowledge
- · Replies 1 ·
Finding the equilibrium force on a 1m×1m hinged gate with water pressure
- Abhishekdas
- · Replies 6 ·
How can stress develop on a moving uniform elastic plank
- Abhishekdas
- · Replies 13 ·
Conceptual question on Modulus of elasticity
- Abhishekdas
- · Replies 13 ·
Verifying Physics Answers for Students
- barthayn
- · Replies 1 ·
Airplane flying in a horizontal circle
- dorkymichelle
- · Replies 3 ·
Seagull Mass from Tension on Telephone Wire
- ova5676
- · Replies 2 ·
Displacement current inside capacitor
- issacnewton
- · Replies 1 ·
Derivation of velocity in nth Bohr orbit
- SucculentLamb
- · Replies 2 ·
Finding year length for a rotating artificial ring planet
- sps37
- · Replies 6 ·
De Broglie wavelength, velocity of electron
- Sublime74
- · Replies 2 ·
Calculating Equivalent Resistance
- PennStateFan1
- · Replies 2 ·
How Is Work Calculated When Pushing a Desk Across a Rough Surface?
- terichristine
- · Replies 1 ·
Relativity, difference in x given t
- ProPatto16
- · Replies 12 ·
Five ropes in equilibrium supporting mass - calculate tension
- Adi1973
- · Replies 4 ·
Does Light Frequency Change When Entering a Solid?
- Mohji
- · Replies 2 ·
Newton's Second Law and an elevator
- Peter G.
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How Is Elevator Motor Efficiency Calculated?
- larry21
- · Replies 3 ·
Volume of solid rotating y=x² between x=2 and x=4 about x=7
- willson.slp
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Work (Conservation of Energy/Newton's Laws)
- jzwiep
- · Replies 3 ·
Calculating Speed after Impulse of 6 Ns
- kerbyjonsonjr
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Finding the electric field from a charged surface
- oceans93
- · Replies 1 ·
Transfrom scheme into eq. scheme with one EMF and one resistor.
- builder_user
- · Replies 36 ·
How do molecules of ethene combine together to form a poly(ethene) molecule?
- andyboy179
- · Replies 2 ·
Absorption of Photon by a Free Electron - Impossible - Conservation Laws?
- Physics Enemy
- · Replies 2 ·
Centripetal force calculation giving unexpectedly large values
- jensson
- · Replies 7 ·
Physical Examples of Divergence Theorem
- Diracster
- · Replies 1 ·
Calculating emf in a Loop with Changing Magnetic Field
- 123yt
- · Replies 4 ·
Energy uncertainty of hydrogen's first excited state using lifetime
- momd
- · Replies 2 ·
Millikan's Oil Drop Experiment graphing problem
- Nitrate
- · Replies 2 ·
Electromagnetic Induction, How to find direction of induced current?
- ryan8642
- · Replies 1 ·
Electric field x-component from uniformly charged rod
- Major Mei
- · Replies 2 ·
Minimum Momentum and Energy from Schrödinger Equation
- erok81
- · Replies 8 ·
Are the E and B fields in phase in an EM wave?
- john b
- · Replies 2 ·
How Fast Can a Proton Move Using a Van de Graaff Generator?
- Nitrate
- · Replies 3 ·
Work done by string, friction, pulling mass up an inclined plane
- revere21
- · Replies 3 ·
Conservation of energy with a pendulum
- physicdummy
- · Replies 3 ·
Kinematics in Polar Coordinates
- theloathedone
- · Replies 11 ·
Does V = iZ apply to all AC circuit values, not just RMS and peak?
- Abhishekdas
- · Replies 4 ·
Statics - Centroid of a 2-D figure
- into space
- · Replies 19 ·
Finding the speed of a dropped block using energy conservation
- jensson
- · Replies 2 ·
Coefficient of friction when wood block slides on inclined plane at 17.157°
- emscare
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Rotational kinetic energy of particles
- SpecialOps0
- · Replies 2 ·
Why is friction on rolling tires static if they're moving?
- ThomasMagnus
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What is the mass of the box held by Guy 3 in a three-pulley system?
- page123
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Finding A1, A2, A3 in the Lorentz transformation
- silmaril89
- · Replies 2 ·
Derivation of equation for star-planet system orbiting com
- moonkey
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Water flow from pipe through sprayer holes in 1 minute
- songoku
- · Replies 5 ·
Shadow of vertical circle on wall?
- donkeycopter
- · Replies 5 ·
Solving Torque Equilibrium Problems: How to Find Tension and Satisfy Conditions
- heelp
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Deriving light ray displacement equations using Snell's law
- thezac11
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How Much Kinetic Energy Do Electrons Need to Resolve a 10fm Nucleus?
- blade_090
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Cross Product of Magnetic Field(B) and Velocity of Charged Particle(v).
- kripkrip420
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Optimal Initial Temperature for Melting Ice in Hot Water
- chawki
- · Replies 27 ·
Why Does a Graduation Tassel Deflect Backward When a Car Accelerates?
- godkills
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Work done by applied force on inclined plane with friction
- elsternj
- · Replies 1 ·
Calculating Power Requirements for a Ski Lift
- elsternj
- · Replies 5 ·
Spring constant of mass-less spring
- alfredo24pr
- · Replies 14 ·
Average force exerted on a ball?
- IAmPat
- · Replies 7 ·
Spring compression as a launcher and velocity at a certain point
- pech0706
- · Replies 3 ·
What is the formula for calculating wave speed through a gas?
- road_runner
- · Replies 2 ·
Total work on 20 N block in pulley system
- elsternj
- · Replies 7 ·
Solving Velocity After Falling 268 Feet
- kevindpalmer2
- · Replies 1 ·
Velocity leaving a cannon, hitting landing cushion, and acceleration experienced
- pech0706
- · Replies 3 ·
Can an Object Maintain Constant KE and Experience Net Acceleration?
- icanletyougo
- · Replies 5 ·
Distance between nodes from two loudspeakers 24m apart at 1000Hz
- pconstantino
- · Replies 7 ·