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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Conducting rod in equilibrium due to magnetic force
- lorenz0
- · Replies 13 ·
Acceleration of system related to rolling motion and pulley
- songoku
- · Replies 35 ·
What is the mathematical model for a traffic shock wave?
- agnimusayoti
- · Replies 22 ·
Why do I get 2 seconds per year for ISS time dilation instead of the correct answer?
- Aristarchus_
- · Replies 50 ·
Resistance of this circuit containing a Circular section
- Aristarchus_
- · Replies 5 ·
Static Friction Question — A wood block sliding on a tabletop
- physicsstudent111
- · Replies 7 ·
Car traffic producing shock wave
- rudransh verma
- · Replies 8 ·
Determine vertical velocity vector on sloped surface
- hjam24
- · Replies 9 ·
Biot-Savart equation for AC current
- Artemisia_
- · Replies 7 ·
Electron and hole concentration
- NerdyGuy
- · Replies 1 ·
Calculating Relative Velocity of Two Boats in a River
- Aristarchus_
- · Replies 57 ·
How Is Acceleration Calculated in Rotational Motion?
- Vladimir_Kitanov
- · Replies 13 ·
Direction of friction on rolling object
- songoku
- · Replies 30 ·
Electromagnetism — finding the current
- physics604
- · Replies 5 ·
Derivative of ##\vec s = \vec \theta \times \vec r##
- Vladimir_Kitanov
- · Replies 15 ·
Can you explain the correct way to choose axes for circular motion analysis?
- link223
- · Replies 4 ·
Human body emittance and net radiant heat loss using Stefan-Boltzmann law
- sprotte
- · Replies 1 ·
Why doesn't this solution work? (Springs and Conservation of Energy)
- CCoffman
- · Replies 2 ·
Oscillation with 2 springs attached to a mass
- link223
- · Replies 20 ·
The total resistance in a circuit
- Aristarchus_
- · Replies 11 ·
Pendulum made with a Ball and two light strings
- Aristarchus_
- · Replies 12 ·
Impact and the Coefficient of Restitution
- Vladimir_Kitanov
- · Replies 8 ·
How to find which direction mass A moves analytically
- link223
- · Replies 32 ·
Boltzmann distribution and ideal gases
- arnesmeets
- · Replies 21 ·
Determining friction force direction from coefficients in linked blocks
- link223
- · Replies 6 ·
Finding number of significant figures
- vcsharp2003
- · Replies 11 ·
Moving in a straight line with multiple constraints
- Jack7
- · Replies 98 ·
Find Flux Density On One Side of Dielectric Boundary Given Boundary Conditions
- Bizkit
- · Replies 1 ·
Equation for an oscillating spring (w/ demping)
- link223
- · Replies 25 ·
Max amplitude of a diving board that will not toss a pebble off?
- link223
- · Replies 39 ·
Maximizing microwave reflection off a pond with n=9.0
- LCSphysicist
- · Replies 1 ·
Finding highest order number for a diffraction grating
- Oijl
- · Replies 1 ·
How to Maximize Inductance in a Coaxial Cable?
- JH2o
- · Replies 1 ·
Perpendicular inelastic collision problem
- NODARman
- · Replies 2 ·
Motion in Cylindrical Coordinates
- Vladimir_Kitanov
- · Replies 9 ·
Finding Time with Work and Distance
- vuhwhat
- · Replies 8 ·
Projectile Motion of motorcyclist
- gjh
- · Replies 20 ·
Intensity of two sound pressure waves
- iQadmat
- · Replies 4 ·
How do you calculate reflectance and transmittance from Fresnel equations?
- LCSphysicist
- · Replies 6 ·
How to determine the car's deceleration at a point along a curve?
- simphys
- · Replies 32 ·
How can I calculate the maximum impact force on the helmet?
- Jun
- · Replies 7 ·
Work done in elevator problem — is it positive or negative?
- pandatime
- · Replies 3 ·
Dynamics problem (force and torque analysis) of a human finger
- ElectricVocaloid
- · Replies 45 ·
Schrödinger Equation (why are U and -x^2 =0?)
- Que7i
- · Replies 2 ·
Finding the voltage drop along a tapered wire
- Sorin2225
- · Replies 30 ·
Help with a circular motion problem
- bloodlust_X
- · Replies 6 ·
Centre of mass (composite rod) - length and densities provided
- pandatime
- · Replies 17 ·
Calculating Max Tension, Final Angle for Swinging on Rope Over Lake
- simphys
- · Replies 43 ·
Poynting theorem and electromagnetic density
- LCSphysicist
- · Replies 7 ·
Where is the normal force applied on an object in contact with a surface?
- Rikudo
- · Replies 15 ·
Number of Waves/Crests in Tsunami Wave Train
- Point Conception
- · Replies 10 ·
Finding the position vector for translated frame of reference
- simphys
- · Replies 9 ·
Spring force calculation giving 1853.7 N instead of 2.32 kN
- pandatime
- · Replies 16 ·
Apparent weight problem (kinematics + conservation of Energy + Newton's laws)
- simphys
- · Replies 41 ·
Thermal energy dissipated from the brakes in a car
- simphys
- · Replies 28 ·
Overall Sound Pressure Level between two Frequencies
- roldy
- · Replies 1 ·
The Diffraction Grating - Fringe Brightness and Spacing
- ap_cycles
- · Replies 1 ·
Using alternating series estimation theorem with non-zero lower integration limits
- DivGradCurl
- · Replies 1 ·
Hall Effect - Properties of a slab of metal
- smahapatra3
- · Replies 1 ·
Conceptual question involving tension and angles
- pandatime
- · Replies 13 ·
Air pressure with Bernoulli's equation
- pompey
- · Replies 3 ·
Direction of friction for three bodies stacked one on top of the other
- lorenz0
- · Replies 13 ·
What is the maximum coefficient of friction for a composite body on a slope?
- Rikudo
- · Replies 7 ·
Observations versus Model-Based Statements about the Sun
- lbtocth
- · Replies 3 ·
Determing the new Near Point after correcting myopia with glasses
- Cheezay
- · Replies 1 ·
A radially pulsating charged sphere creates which of these effects?
- LCSphysicist
- · Replies 12 ·
Uncertainty in the standard deviation
- Shukie
- · Replies 2 ·
The angle at which a skier will leave the sphere
- simphys
- · Replies 32 ·
I-V graph of Diode using a C.R.O.
- cloudone
- · Replies 6 ·
Gravitational PE for a certain distance from the Sun
- simphys
- · Replies 8 ·
Upward force of float moving in an arch under water
- mrapple
- · Replies 14 ·
Finding the refractive index for nonreflective film coating
- Andy1011
- · Replies 1 ·
Conservation of energy problem with friction included
- simphys
- · Replies 3 ·
Car-Car System: Energy Conservation?
- simphys
- · Replies 2 ·
What is considered the "System" here? (conservation of energy problem)
- simphys
- · Replies 20 ·
Why did different reference frames give different answers for elastic potential energy?
- simphys
- · Replies 34 ·
Density versus Pressure -- Balancing the bouyancy of a floating capsule
- mrapple
- · Replies 19 ·
How Do Relevant Equations Help Solve Problems?
- postmalone
- · Replies 1 ·
Moment of inertia of a uniform square plate
- lorenz0
- · Replies 3 ·
How Do Angular and Linear Velocities Relate in Cyclist Work-Energy Problems?
- simphys
- · Replies 25 ·
Work done on a falling elevator by a spring + gravity
- simphys
- · Replies 6 ·
A spring, disk and pulley system
- lorenz0
- · Replies 40 ·
Tension in a complex-pulley-system
- Rikudo
- · Replies 27 ·
How is the slope of the shear force equal to the negative of the load?
- Svelte1
- · Replies 5 ·
How Does Acceleration Affect Tension in a Cable Car System?
- aebrenn
- · Replies 1 ·
Lab report (photelectric effect to determine Planck's constant)
- silverthorne
- · Replies 1 ·
Is the Hertzian Contact Model Suitable for Simulating Car Braking on Wet Roads?
- ROOT0X57B
- · Replies 4 ·
Projectile Launch Angle: What Could Be Causing My Arccos Computation Problem?
- dejavu333
- · Replies 1 ·
Find v_1 for projectile using start position, final position and angle
- GreyNoise
- · Replies 10 ·
Why Do Energy Bands Split and Merge in Semiconductors?
- hardyivan007
- · Replies 1 ·
What is the atomic spacing D of this crystal?
- spaghed87
- · Replies 1 ·
Arch Truss Bridge, Static Determinacy
- engineer248
- · Replies 2 ·
Fluid Dynamics Question: A glass tube areas, pressure, determine height.
- ReMa
- · Replies 1 ·
How Does Efficiency Impact Velocity Ratio in a Third Class Lever?
- junkie_ball
- · Replies 2 ·
What is the Full-Load Voltage of a DC Generator at 800 rpm?
- Katsmed23
- · Replies 1 ·
Single-slit diffraction and small angle approximation
- konto77
- · Replies 1 ·
Electrostatic equilibrium between 3 styrofoam balls
- paul11
- · Replies 1 ·
How Does Stepping on a Hose Affect Water Flow and Speed?
- jdg
- · Replies 1 ·
Mass-Spring-Damper time response to step input
- hhspunter
- · Replies 1 ·
Finding the minimum speed for putting an object in orbit
- pc2-brazil
- · Replies 1 ·