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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Electric field due to a flat hollow disk
- madafo3435
- · Replies 4 ·
Kinematics Question: A motorboat and a log in a stream
- dudu
- · Replies 3 ·
Question regarding the Pressure of a gas flowing from a cylinder into balloons
- zee123
- · Replies 6 ·
Hitting a rocket with a projectile
- MichaelTam
- · Replies 53 ·
How to find Tb and Moments 3D equilibrium of rigid bodies
- mcrooster
- · Replies 12 ·
Beam with a rope - type of problem (Statics)
- goodOrBad
- · Replies 6 ·
What Should Manufacturers Specify: Peak Power or Average Power in Audio Systems?
- Physicslearner500039
- · Replies 1 ·
Why did solving ionization energy with potential energy give the wrong n?
- jjson775
- · Replies 9 ·
Mutual inductance when coil axes are perpendicular
- Physicslearner500039
- · Replies 5 ·
Find the altitude and the speed of two jets with Doppler Effect
- Edel Crine
- · Replies 1 ·
Electric Field of a Finite Cylinder
- wxguy28
- · Replies 3 ·
Stunt driver car jump: projectile motion velocity components
- nicky670
- · Replies 8 ·
Tension and reaction force in circular motion
- Like Tony Stark
- · Replies 2 ·
A mistake in the derivation of escape velocity
- Leo Liu
- · Replies 5 ·
How Does the Order of People Jumping Affect the Final Velocity of a Flatcar?
- Leo Liu
- · Replies 9 ·
Finding the center of mass of a solid hemisphere
- Hamiltonian
- · Replies 19 ·
Two rods, each with a free and a fixed ball and a spring
- Like Tony Stark
- · Replies 9 ·
Why Is My Calculation Result for Acceleration Incorrect?
- nicky670
- · Replies 10 ·
How Do You Calculate the Buoyant Force for a Stratospheric Balloon?
- nicky670
- · Replies 9 ·
Why will acceleration be -9.8 if it is moving upward direction?
- nicky670
- · Replies 7 ·
Kinematics, Conservation of energy, momentum
- wcjy
- · Replies 9 ·
A pyramid of three cylinders (statics problem)
- lloydthebartender
- · Replies 15 ·
Calculating the Force Required for a Moving Wedge and Block System
- tryingtolearn1
- · Replies 5 ·
Calculating Time Difference and Length Contraction in Train Overtaking Scenario
- Amrator
- · Replies 11 ·
Solving Special Relativity Problem with Train Walking
- Amrator
- · Replies 14 ·
Finding the angle of a fragment in an explosion using momentum vectors
- AN630078
- · Replies 38 ·
Why does water have the same density at 1°C and 8°C?
- nicky670
- · Replies 8 ·
Momentum and Conservation of energy
- wcjy
- · Replies 2 ·
Integration ##\ddot\phi = -\omega^2\phi##
- happyparticle
- · Replies 4 ·
What is the formula for calculating electrical potential?
- jjson775
- · Replies 6 ·
Applying kinematic equations without velocity information
- takelight2
- · Replies 11 ·
Is the Calculation of Linear Density k for a Uniformly Charged Bar Correct?
- ToucanFodder
- · Replies 3 ·
Voltage using different references
- darioslc
- · Replies 4 ·
Hollow and solid spheres floating in liquid
- brotherbobby
- · Replies 16 ·
Calculating Time with Forces Acting on a Block
- tryingtolearn1
- · Replies 5 ·
Trouble Understanding Phasor to Time Domain Conversion Math
- Mark Zhu
- · Replies 2 ·
Mechanics: Motion of Two Connected Vehicles
- AN630078
- · Replies 3 ·
Specific work done by an adiabatic & reversible compressor on air
- Master1022
- · Replies 6 ·
How to draw the transfer behavior of a fuzzy controller
- Elias_HH
- · Replies 6 ·
Which symbol for refractive index, μ or n?
- anyonebutangel
- · Replies 6 ·
Calculator Question (Casio) -- How to disable "Shift 9 = AC"
- chriscarson
- · Replies 11 ·
Finding net charge on a sphere's surface
- archaic
- · Replies 4 ·
Why is jumping onto a moving train harder than it seems?
- john007
- · Replies 35 ·
Force on a charge at the tip of a hollow, charged cone
- cwill53
- · Replies 5 ·
Conservation of Energy Along an Incline with Friction
- ag3
- · Replies 3 ·
Proving that the total mechanical energy is conserved with time
- Hamiltonian
- · Replies 2 ·
Zero Force from 3 charges placed at the vertices of a Triangle
- cwill53
- · Replies 43 ·
Standing waves on a string -- Find the difference of phases
- LCSphysicist
- · Replies 5 ·
Change the wavelength in a driven rope?
- Edel Crine
- · Replies 7 ·
Energy Conservation between mechanical and electrical
- Physicslearner500039
- · Replies 7 ·
How Is the Electric Field Difference Across a Charged Surface Determined?
- madafo3435
- · Replies 2 ·
Uncertainty in the measurement of the focal length in this experiment
- songoku
- · Replies 13 ·
Using Gauss' Law to find the field at a point
- rtareen
- · Replies 6 ·
Significant Figures with Experimental Values
- i_love_science
- · Replies 5 ·
Does a π phase shift from reflection advance or lag the wave?
- LCSphysicist
- · Replies 1 ·
Normal force and cable tension for accelerating elevator
- AN630078
- · Replies 10 ·
Elastic Collision of Hydrogen and Carbon Atoms
- AN630078
- · Replies 9 ·
Why Does a Moving Rod Appear Inclined in Different Reference Frames?
- Data Base Erased
- · Replies 2 ·
How do you calculate the acceleration of a block sliding down a plane?
- tryingtolearn1
- · Replies 14 ·
Circular Motion of a Cyclist and a Car going around a bend in the road
- AN630078
- · Replies 6 ·
Deriving d/dt[a · (v × r)] with the product rule
- happyparticle
- · Replies 16 ·
Find the potential using a line integral (Electromagnetism)
- Vitani1
- · Replies 1 ·
Write the equations of a mass and spring in different accelerated systems
- Like Tony Stark
- · Replies 20 ·
Finding the potential difference of a diode
- Ben1238
- · Replies 6 ·
Difference between curvilinear and rotational motion
- Like Tony Stark
- · Replies 9 ·
Final Image position for a setup with two lenses
- nish95
- · Replies 26 ·
When does gravitational potential energy apply in rolling motion problems?
- plomeiko
- · Replies 4 ·
Real and Complex representations of an oscillation equation
- e_mts
- · Replies 15 ·
Calculating the distance between fringes in an alternate universe
- Vitani1
- · Replies 3 ·
Work done by a conservative force using change in potential energy
- Hamiltonian
- · Replies 5 ·
What is the Relationship Between Velocity, Radius, and Force in a Pulley System?
- AN630078
- · Replies 4 ·
Duct pressure unit conversions not checking out
- cwill53
- · Replies 5 ·
Interpreting line EB on spacetime diagram from Schutz Fig. 1.14
- Vitani1
- · Replies 8 ·
Finding angular Momentum from a force
- fer Mnaj
- · Replies 6 ·
Why is thin film interference maximum 2d = (m + 1/2)λ not 2d = mλ?
- songoku
- · Replies 3 ·
Polish Physics Olympics problem with unknown circuit dependencies
- Frouel
- · Replies 2 ·
Bicycle wheel forced to roll around a vertical axle
- Nexus99
- · Replies 20 ·
A traveling wave on an infinite string, find the intensity
- LCSphysicist
- · Replies 5 ·
The leaning ladder problem using Newtonian mechanics
- Hamiltonian
- · Replies 27 ·
Why Doesn't My Method Work for Calculating Angular Speed of a Falling Rod?
- dyn
- · Replies 18 ·
Equivalent resistance of a section of a graphite ring
- A13235378
- · Replies 13 ·
How to Determine Reaction Forces on a Gyroscope at Points A and O?
- Like Tony Stark
- · Replies 5 ·
Calculating Wave Amplitude and Frequency
- Edel Crine
- · Replies 25 ·
Is the Lorentz transform just switching between reference frames?
- billllib
- · Replies 4 ·
A rotating rod acted upon by a perpendicular force
- Hamiltonian
- · Replies 10 ·
How come 7,271,000 mm^3 is equivalent to 7,271 cm^3 ?
- chriscarson
- · Replies 23 ·
Electromagnetism: Force between two charged plates
- oondi
- · Replies 1 ·
Why is capacitor voltage −20V at t=0− in RLC parallel circuit?
- jisbon
- · Replies 10 ·
Solving a Pendulum Problem with Exponential Solution
- archaic
- · Replies 23 ·
Three charges attached to the vertices of a triangle
- LCSphysicist
- · Replies 4 ·
Calculating Earth's Effective Spring Constant for its Orbit Around the Sun
- Edel Crine
- · Replies 8 ·
Second order differential equation solution
- Ron Burgundypants
- · Replies 6 ·
Lagrange Multipliers and Energy Loss Question
- cwill53
- · Replies 19 ·
Two block problems with friction
- Hamiltonian
- · Replies 6 ·
Relationship between Cp, Cv and R
- PSN03
- · Replies 7 ·
Nonlinear Hooke's law: cubic term vs Taylor expansion
- patric44
- · Replies 28 ·
What Experiments Can I Conduct to Investigate Light Sensitive Devices?
- Taksehasam
- · Replies 5 ·
What causes an object to rotate?
- Like Tony Stark
- · Replies 5 ·
Magnetic field from moving charge cross product
- Physicslearner500039
- · Replies 3 ·
What happens when an uncharged object is brought into an electric field?
- aspodkfpo
- · Replies 4 ·