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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How to Calculate the Coefficient of Friction
- ewarsaw
- · Replies 19 ·
Preparing for Physics Final: Understanding Waves and Frequencies
- Steezy
- · Replies 3 ·
How much work does the brake system have to do to stop the car at each speed?
- laylay918
- · Replies 5 ·
Finding the exerting forces in a container
- Philip Wong
- · Replies 2 ·
Calculating Power Factor in and RLC Circuit
- rott3np3anut
- · Replies 1 ·
Forces on adjacent accelerating bodies
- subzero800
- · Replies 1 ·
Ra-226 decay heating a 0.2g sample by 1°C
- Magda|A380
- · Replies 3 ·
Satellite in orbit - forces involved
- jsmith613
- · Replies 3 ·
What is the speed of a mass in simple harmonic motion at 0.60m?
- speedskater
- · Replies 15 ·
How does refraction of light in water affect the perceived location of objects?
- CAF123
- · Replies 1 ·
Approximation of integral for small boundary
- Fraggler
- · Replies 3 ·
Proving the ratio of heights for two stones thrown upward
- johsun123
- · Replies 4 ·
How do I prove that the wave function R_{10}(r) is normalized?
- karkas
- · Replies 3 ·
Betty's force in tug of war with two possible directions for Charles
- wbetting
- · Replies 1 ·
Spaceship travels at .83 c, relativity
- harts
- · Replies 4 ·
Position vs time graph for three-segment rush-hour traffic motion
- theintarnets
- · Replies 5 ·
Electric potential zero between two point charges
- curiousjoe94
- · Replies 9 ·
Using travel distance or remaining distance to solve motion problems
- manal950
- · Replies 15 ·
Collision of particles; centre of mass problem
- charmedbeauty
- · Replies 3 ·
Instantaneous velocity, help me please
- Veloco-raptor
- · Replies 3 ·
Zero electric field point between two positive point charges
- curiousjoe94
- · Replies 6 ·
Calculating the doppler red shift
- robertjford80
- · Replies 4 ·
Magnetic field at center of rotating charged nonconducting sphere
- SoulofLoneWlf
- · Replies 9 ·
Understanding Symbolic Math in MATLAB: Real and Imaginary Parts
- zhaniko93
- · Replies 1 ·
What Are the Initial Angular Velocity and Angular Acceleration of the Flywheel?
- manal950
- · Replies 1 ·
Cylinder pulled by tangential string: finding linear and angular acceleration
- spacelike
- · Replies 3 ·
How can a mirror form an image of a virtual image?
- jadelamlam
- · Replies 4 ·
What Are the Conditions for Nuclear Fission?
- tasha.pnerd
- · Replies 1 ·
Calculating Distance for Negative Acceleration
- CarlosMarti12
- · Replies 1 ·
Magnetic field of two current-carrying wires crossing over
- ness87
- · Replies 2 ·
Two-car collision analysis with momentum conservation
- Veloco-raptor
- · Replies 9 ·
Find min velocity so that particle grazes the shell
- Saitama
- · Replies 8 ·
Moment of inertia of a three particle system
- Avatrin
- · Replies 2 ·
A motorcycle catches a car after accelerating
- Pioneer98
- · Replies 12 ·
Resistance of Cylindrical Conductor
- aaas
- · Replies 22 ·
How High Is a Meteor When It Accelerates Toward Earth?
- EE123
- · Replies 4 ·
Universal Gravitation and Gravitational Field Question
- EE123
- · Replies 6 ·
How Long Until a Thrown Ball Hits the Ground?
- manal950
- · Replies 8 ·
Help solving 9 introductory physics problems
- spartankaboos
- · Replies 1 ·
Solving Diffraction Grating Homework: Max Wavelength at 11°
- Swan
- · Replies 4 ·
Percentage uncertainty in 1 keV electron momentum from position measurement
- karkas
- · Replies 3 ·
A body moving with simple harmonic motion has an amplitude of 1
- manal950
- · Replies 1 ·
Determining speed of an oscillating object
- speedskater
- · Replies 5 ·
Newton's laws and friction problems using ΣF=ma
- sammy852
- · Replies 1 ·
Finding frequency of a 50 m string with 4.41 N tension
- physicsfun88
- · Replies 15 ·
What Is Oliver's Recoil Speed on Ice After Throwing a Rock?
- grewas8
- · Replies 15 ·
Emf of a Closed Loop of Wire In a Magnetic Field
- rocketgirl93
- · Replies 20 ·
Voltage across Capacitors in Parallel
- rocketgirl93
- · Replies 8 ·
Final temperature of diamond using Cv
- Ryomega
- · Replies 8 ·
One stone dropped one is thrown from a building, they reach the ground at the same ti
- Pioneer98
- · Replies 10 ·
The initial speed of two moving bodies given an increment of velocity.
- LiamC
- · Replies 6 ·
Ground-state energies of electron gas
- tsopa
- · Replies 2 ·
Why does stepping up voltage reduce I²R losses in transmission cables?
- aznking1
- · Replies 4 ·
Is the Equilibrium of the Negative Charge at Point A Stable or Unstable?
- Saitama
- · Replies 8 ·
Specify the reference state for potential energy?
- charmedbeauty
- · Replies 17 ·
Finding where a biker catches a car using only distance d
- StrawHat
- · Replies 16 ·
Does an object stop dead after it is dropped and hits the floor?
- goomer
- · Replies 1 ·
Equipotential line and electric field
- Saitama
- · Replies 5 ·
How to find the current in the no resistor wire?
- qpzm77gg
- · Replies 3 ·
Circular motion- banked curve, show that friction is necessary
- dani123
- · Replies 4 ·
Inelastic collision problem - question doesn't make sense
- randomkent
- · Replies 3 ·
Race Car Driver's Average speed
- Pioneer98
- · Replies 3 ·
Calculate Force to Elongate Steel Bar
- raiderUM
- · Replies 4 ·
Damped Oscillations: Does Time Change?
- amit25
- · Replies 3 ·
Potential difference after removing dielectric from charged capacitor
- vbgirl
- · Replies 14 ·
Potential of two points how are they same?
- nishantve1
- · Replies 4 ·
Calculating the centre of mass of a U shaped conductor/Magnetic Field
- Mathoholic!
- · Replies 2 ·
What is the acceleration of a block in this scenario?
- Benja303
- · Replies 3 ·
Calculating different in temperature using a material's conductivity
- steve321
- · Replies 5 ·
Projectile Motion Question - Can someone verify that the question is correct?
- cerealkiller
- · Replies 6 ·
Electric field due to non uniformly charged spherical shell
- lavesh
- · Replies 1 ·
Electromagnetic induction inside a field with a contraint
- caspernorth
- · Replies 4 ·
I want the ideas for solving those questions
- manal950
- · Replies 1 ·
Showing work done on gas in a reversible process
- Ryomega
- · Replies 2 ·
Projectile motion, problem with only general equations
- Scorpy
- · Replies 1 ·
Confusion:collapsing 3 points with equal potential in a cubical resistor network
- nishantve1
- · Replies 15 ·
Electrostatics and velocity question
- Saitama
- · Replies 15 ·
Gravitational potential energy of a car
- mike168
- · Replies 5 ·
How Far Do Different Colors Spread in a Diffraction Grating Experiment?
- dlucia
- · Replies 8 ·
What Is the Dipole Moment of This Charge Configuration?
- Saitama
- · Replies 5 ·
Voltage across a load resistor in a Voltage Divider Circuit
- Martinet
- · Replies 6 ·
Potential difference in a sphere relative to infinity
- dincerekin
- · Replies 6 ·
Acceleration of a runner to finish in his desired time
- Pioneer98
- · Replies 2 ·
Why Doesn't the Earth Move When Objects Fall?
- Bashyboy
- · Replies 3 ·
Max height at the top of the ramp of object launched by spring
- andrewwg94
- · Replies 1 ·
A few quick problems with kinematics
- m00nbeam360
- · Replies 2 ·
How long it takes for a car to catch a truck
- Pioneer98
- · Replies 6 ·
How long to melt the ice(heat, heat transfer, latent heat)
- supernova1203
- · Replies 3 ·
Why does kettle efficiency increase with larger water volumes?
- Dyl
- · Replies 6 ·
How high is the tree branch(conservation in energy/kinematics)
- supernova1203
- · Replies 4 ·
Gauss' law and conducting spheres
- srn
- · Replies 6 ·
How Does Magnet Height Affect a Pendulum's Period?
- StasKO
- · Replies 16 ·
A shaft is uniformly accelerated from 10rev/s to 18 rev/s in 4 sec .
- manal950
- · Replies 28 ·
Simple tension problem, I can't seem to understand it
- dakotapederse
- · Replies 2 ·
Light- critical angle/refraction/reflection
- physicsluv
- · Replies 2 ·
Calculate the equivalent capacitance of the circuit
- arl146
- · Replies 7 ·
Coupled Oscillators (Electrical Circuit)
- roam
- · Replies 28 ·
Integrating for area under a curve.
- Darth Frodo
- · Replies 9 ·
I am an idiot, me. (Find the force of a tennis ball)
- Blablablabla
- · Replies 3 ·
Does alpha decay convert mass to kinetic energy?
- gbaby370
- · Replies 6 ·