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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Rotational Dynamics: Net Torques
- henryli78
- · Replies 2 ·
One of Boris Korunsky's brain twisters
- Salamon
- · Replies 7 ·
Question regarding calculating the time it takes for an object to fall
- LegendF
- · Replies 9 ·
Shear force and bending moment diagrams for 3-pinned frame
- Phil52
- · Replies 1 ·
Does IR Radiation Have a Higher Energy Level Than UV Light for Warming Objects?
- Sarpedon
- · Replies 6 ·
Easy center of mass/toppling question?
- Nanosuit
- · Replies 7 ·
Calculating Gear Ratio for Epicyclic Gear Train
- lewisbedwell
- · Replies 1 ·
How Does Electron Flow Correspond to Electric Field Direction in Circuits?
- tripleA
- · Replies 5 ·
Kinetic energy of a pendulum in motion
- CAF123
- · Replies 19 ·
Max Allowable Deviation for Projectile Range of 50km
- negation
- · Replies 5 ·
Minimum force required to turn over box.
- peripatein
- · Replies 1 ·
Applied force in horizontal direction on block on a inclined plane.
- get_physical
- · Replies 6 ·
Why must the axis of rotation of a rolling body be at rest?
- andyrk
- · Replies 5 ·
Acceleration in 2 component directions
- get_physical
- · Replies 7 ·
Quantum mechanics , total orbital angular momentum?
- Outrageous
- · Replies 3 ·
Speed of a transverse wave in srting
- Nemo's
- · Replies 3 ·
Van de Graaff generator questions?
- AFSteph
- · Replies 12 ·
Arrow fired from 60 m cliff at 80 m/s, 30° above horizontal
- Medgirl314
- · Replies 20 ·
A small task with Newton's Laws
- Jirya
- · Replies 8 ·
Determining the mass of Pluto using its moon
- Softshow
- · Replies 5 ·
Determining Starting Height of Skier
- Softshow
- · Replies 2 ·
Terminal Voltage: Solving for 12V Motorcycle Battery Charger
- burnst14
- · Replies 2 ·
Resolving Inductance Issues: 0.2H Coil Resistance Calculation
- brenfox
- · Replies 5 ·
Energy conservation of a light spring
- haha1234
- · Replies 5 ·
Photoelectric Effect: Solving a Stopping Potential Problem
- nichelfish
- · Replies 2 ·
Polarisation past paper question
- KiNGGeexD
- · Replies 1 ·
Why damped oscillations aren't simple harmonic motion
- krissh
- · Replies 1 ·
Very simple Lines of Force question
- AFSteph
- · Replies 2 ·
Time Lapses In Two Different Reference Frames
- Bashyboy
- · Replies 1 ·
Distance to reach terminal velocity
- abdo799
- · Replies 15 ·
Minimum speed for hammer to clear hole edge from 3.1m away
- negation
- · Replies 21 ·
Calculating Energy of a Dipole
- Observer Two
- · Replies 3 ·
Circular Motion of a car around a curve
- haha1234
- · Replies 30 ·
Satellite launched at 60° angle from north pole to south pole
- AwesomeTrains
- · Replies 9 ·
A Formula for Rate of Evaporation
- marvolo1300
- · Replies 7 ·
Carnot engine between reservoirs with equal heat capacities
- junfan02
- · Replies 7 ·
How high is the cliff and speed of arrow?
- Medgirl314
- · Replies 10 ·
Electric Current in Moving Plate Capacitor with Velocity 6 m/s and U=600 V
- Noirro
- · Replies 4 ·
What is gm in a circuit symbol with overlapping circles?
- KiNGGeexD
- · Replies 6 ·
Projectile motion of tennis ball with air resistance
- Shruf
- · Replies 5 ·
What is the most efficient method for solving this gravitational field problem?
- Saitama
- · Replies 4 ·
S.H.M.: Is Acceleration Directly Proportional to Displacement?
- krissh
- · Replies 2 ·
Where Does the Arrow Land? Solving for Horizontal Projectile Motion
- Medgirl314
- · Replies 14 ·
Vectors and Components-Part One
- Medgirl314
- · Replies 10 ·
Moment of Inertia Tensor Cylinder.
- binbagsss
- · Replies 6 ·
Lines resolved by the instrument
- utkarshakash
- · Replies 3 ·
What Is the Coefficient of Friction in an Equilibrium System?
- e4physics
- · Replies 5 ·
Is sound affected by gravity at all?
- Heisenberg52
- · Replies 8 ·
Finding Planetary Radius using density and escape velocity
- elDuderino81
- · Replies 6 ·
What is the voltage drop across the resistor in a discharging RC circuit?
- brenfox
- · Replies 15 ·
Ball pushed by spring across frictionless surface to holes
- harelori
- · Replies 4 ·
How Does Current Behave in a Discharging RC Circuit?
- brenfox
- · Replies 1 ·
Water pistol jet: force needed to hit target at 2.5m height and 5m distance
- Scientist94
- · Replies 9 ·
Satellite launched at 60° from 2 Earth radii with apogee limit of 6 Earth radii
- AwesomeTrains
- · Replies 12 ·
Work-Energy involving two forces on a pulley.
- Ascendant78
- · Replies 6 ·
Child's Play-How high was the swing?
- Medgirl314
- · Replies 16 ·
Find the Time Period [ block-spring simple system]
- shivam01anand
- · Replies 2 ·
What is the impact of the moon's disappearance on Earth's rotation?
- Sonya36
- · Replies 2 ·
Monorail problem with coefficient of fiction and front and rear wheel drive
- wallism
- · Replies 15 ·
Why don't the vertical resistors count in this circuit?
- Entanglement
- · Replies 10 ·
Why do charges lose energy only through resistors?
- DorelXD
- · Replies 35 ·
Determine Forces Acting on Rope for Homogeneous L-Shaped Beam
- Numeriprimi
- · Replies 1 ·
What Fraction of Initial Height Causes a Plank to Lose Wall Contact?
- Tanya Sharma
- · Replies 30 ·
Fractional change in wavelength
- utkarshakash
- · Replies 3 ·
Circular Motion while learning to drive
- haha1234
- · Replies 3 ·
Equivalent resistance of a complicated circuit
- Entanglement
- · Replies 1 ·
Does the Central Point Charge Affect Total Charge in a Spherical Shell?
- Observer Two
- · Replies 12 ·
Minimum mass for second collision with spring-coupled masses
- peripatein
- · Replies 39 ·
Special Relativity - Finding Velocity
- Insolite
- · Replies 1 ·
What Must the Muzzle Velocity Be for a Shell to Clear a Cliff?
- Insolite
- · Replies 2 ·
Amplitude of oscillation after two masses separate from a compressed spring
- Tanya Sharma
- · Replies 26 ·
Exponential formulation of waves
- 11thHeaven
- · Replies 2 ·
How does the wavelength of light affect the radius of a diffraction disc?
- utkarshakash
- · Replies 2 ·
Motion in 2 dimension-example from book
- negation
- · Replies 4 ·
Work-Energy Theorem locomotive Question
- Speedking96
- · Replies 7 ·
The laws of motion-a toy with a accelerating car
- haha1234
- · Replies 12 ·
Second Order Differential Equation to show s = ut +(1/2)at^2
- Woolyabyss
- · Replies 7 ·
Finding magnitude F and angle theta for 750N resultant force
- Jintachi
- · Replies 12 ·
Why does raising indices on ε₀₁₂₃ give ε⁰¹²³ = -ε₀₁₂₃?
- binbagsss
- · Replies 1 ·
Kinematics (rectilnear motion) spring.
- whynot314
- · Replies 8 ·
Kinematics - Velocity, force of gravity, terminal speed
- Sonia22
- · Replies 1 ·
Calculating Max Power at Chute-Montmorency
- PVnRT81
- · Replies 3 ·
Spectral radiance of the sun for 400nm
- bvbellomo
- · Replies 5 ·
Two pendulum masses connected by a spring: finding the coupled equations
- skrat
- · Replies 22 ·
What happens to electric PE as n increases in a hydrogen atom?
- utkarshakash
- · Replies 3 ·
How are higher voltages achieved in car ignition systems?
- Noirro
- · Replies 1 ·
Coriolis and centrifugal forces
- Karol
- · Replies 10 ·
Pendulum with Spring: Finding Position and Period
- Calabi_Yau
- · Replies 11 ·
How Much Force is Needed to Keep a Drilled Cylinder at Rest?
- physicsboy121
- · Replies 3 ·
How Does Current Distribution Affect Magnetic Field in a Cylinder?
- ajdin
- · Replies 6 ·
What Angle Does a Pendulum Form When It Stops?
- ThatDude
- · Replies 3 ·
How can one calculate entropy? What is entropy?
- yhPscis
- · Replies 2 ·
Millikan oil drop apparatus: finding radius and charge with missing values
- astri_lfc
- · Replies 1 ·
Static and rolling friction difference
- alingy1
- · Replies 10 ·
Calculating Kinetic Energy of an Alpha Particle
- astri_lfc
- · Replies 2 ·
Static and kinetic friction in a car halting
- alingy1
- · Replies 8 ·
Thermal conductivity in a heating system
- astri_lfc
- · Replies 8 ·
Does Running Affect the Speed of a Ship During Travel?
- omarMihilmy
- · Replies 7 ·
Integration and interpretation of constant of acceleration-answer chec
- negation
- · Replies 3 ·
How many drops per second keeps the protagonist awake? answer check
- negation
- · Replies 3 ·