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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Force on a Cyclist: Net Force Calculation
- DarkEnergy890
- · Replies 4 ·
Understanding Molecular Vibration of HF: Equilibrium Distance and Binding Energy
- schniefen
- · Replies 4 ·
Determine the point of application of a resultant force
- SumDood_
- · Replies 10 ·
Why no vertical lines when drawing this graph
- member 731016
- · Replies 2 ·
Link between increase in Potential energy and the thermal energy lost
- mathbrain9
- · Replies 21 ·
Angular velocity of an oxygen molecule.
- j_namtirach
- · Replies 7 ·
Alternative method of finding Electric flux from non-uniform field
- member 731016
- · Replies 6 ·
Why Are My Kirchhoff Voltage Rule Equations Incorrect?
- bob1352
- · Replies 1 ·
Unclear differential equation from a thermodynamics textbook
- NODARman
- · Replies 2 ·
How to apply the definition of work in the x-direction
- member 731016
- · Replies 8 ·
Symmetry behind charged spring-mass system in Electric field
- member 731016
- · Replies 2 ·
Heat Radiation question (skin's reaction to UV versus IR radiation)
- vcsharp2003
- · Replies 33 ·
Why is the elastic potential energy in position 2 zero?
- simphys
- · Replies 6 ·
Rocket Problem -- Solve using the Rocket Equation
- mannerplay
- · Replies 4 ·
Calculating the Electric field inside an infinite planar slab using Gauss' Law
- Jaccobtw
- · Replies 19 ·
Error propagation leads to different uncertainties, which do I choose?
- TheMercury79
- · Replies 15 ·
Moment of inertia for a rotating rod with torsional spring work
- simphys
- · Replies 16 ·
Torque on two pillars (introductory physics problem)
- Camden
- · Replies 14 ·
Why isn't normal force along the radial line in this FBD?
- simphys
- · Replies 7 ·
I try to solve a thermodynamics problem on heat transfer
- Salmone
- · Replies 3 ·
Deriving Wave Function for One-Dimensional Sinusoidal Wave
- member 731016
- · Replies 4 ·
Find the speed of the biker at the bottom of the hill
- paulimerci
- · Replies 38 ·
Lorentz Transformation - Speeds relative to different observers
- R3ap3r42
- · Replies 7 ·
Does the Galilean transform rely on 2 events?
- jimmy4554564
- · Replies 9 ·
Why does buoyant force add to scale reading, not tension?
- TkoT
- · Replies 2 ·
Torque on a derrick from Feynman exercises
- suh112
- · Replies 2 ·
Angle between normal force and radial line for cylindrical coordinates
- simphys
- · Replies 21 ·
Alpha particle kinetic energy from thorium decay
- haha0p1
- · Replies 25 ·
Why doesn't the converse work for block sliding friction inequality?
- teo11
- · Replies 19 ·
Finding magnetic field direction and time-dependent area in flux calculation
- JoelKTH
- · Replies 9 ·
Finding angular velocity and acceleration of a drum from linear motion
- etile
- · Replies 3 ·
Should she speed up or stop?
- paumndi
- · Replies 15 ·
Distance traveled by a Ball affected by friction after t seconds
- Volt582
- · Replies 4 ·
How to find resulting velocity in a perfectly elastic collision?
- haha0p1
- · Replies 5 ·
Inelastic collisions with constant momentum
- haha0p1
- · Replies 5 ·
Explosion of 2 Carts on a Platform (Momentum)
- uSee2
- · Replies 40 ·
Finding Velocity: Ek of the Trolley
- haha0p1
- · Replies 4 ·
External force on three blocks stacked
- brotherbobby
- · Replies 3 ·
How do I find the work done for a 100 N downward force?
- haha0p1
- · Replies 4 ·
Finding the WORK done by a crane in lifting a load
- vinci
- · Replies 14 ·
Approximating Answers When Exact Numbers Are Involved
- TRB8985
- · Replies 7 ·
Deriving displacement from velocity when initial conditions don't start at t = 0
- Old_sm0key
- · Replies 6 ·
When does a bungee cord go slack during a jump?
- DarkEnergy890
- · Replies 5 ·
Why is a small nut attracted to a straw whereas it should be repulsed?
- Lotto
- · Replies 47 ·
Static Friction Required to Keep the System from Moving (Two Boxes)
- BurpHa
- · Replies 16 ·
Derive an expression for the radial charge distribution of an E field
- Jaccobtw
- · Replies 3 ·
Why is my method for finding the spring constant incorrect?
- josevie
- · Replies 17 ·
Coin Slipping on a Spinning Wheel
- uSee2
- · Replies 20 ·
Period of a simple pendulum with a magnet under it
- MatinSAR
- · Replies 9 ·
Coefficient of kinetic friction in Young & Freedman 7.81
- Argonaut
- · Replies 5 ·
Suvat vector versus the scalar form
- heroslayer99
- · Replies 44 ·
Do you need to account for the water heating up to the boiling point?
- curly_ebhc
- · Replies 23 ·
Static Friction Between a Box and the Floor
- BurpHa
- · Replies 11 ·
Spring-mass system in water: applying first law of thermodynamics
- vcsharp2003
- · Replies 37 ·
Why Is Taking Moments at Point A' Incorrect in Rotational Balance Problems?
- tracker890 Source h
- · Replies 14 ·
Calculating Trajectory Equation of Motion for a Rock Touching a Wall
- compaq65
- · Replies 32 ·
Two charged spheres hitting each other
- lorenz0
- · Replies 7 ·
Significant Figures Verification
- TRB8985
- · Replies 1 ·
Find acceleration of Moving incline with a block on it
- iceninja3
- · Replies 11 ·
Find the tension in the two strings
- chwala
- · Replies 7 ·
Use the energy method to find the distance moved by particle
- chwala
- · Replies 1 ·
Change in Angular Velocity While Orbiting With No Torque
- uSee2
- · Replies 30 ·
Calculating Ion Distance in a 1D Lattice: A Simple Solution
- sinna
- · Replies 5 ·
Finding acceleration from Velocity vs Position graph
- iceninja3
- · Replies 2 ·
Intermediate axis theorem (Tennis racket theorem)
- Lambda96
- · Replies 3 ·
Pressure inside the zeppelin for it to float
- Fluid mechanics
- · Replies 8 ·
Calculating the motion of air cylinder
- Some1WhoNeedsHelp
- · Replies 5 ·
Bungee jumper energy transformation and total energy calculation
- paulimerci
- · Replies 44 ·
Masses colliding due to gravitational attraction
- jolly_math
- · Replies 2 ·
Satellite with off-center thruster: linear vs rotational momentum split
- vasya
- · Replies 35 ·
What is the minimum time at a given angle on a cone with constant size?
- bowes78
- · Replies 18 ·
Can a ring's impedance be treated as a series connection with string impedance?
- gasgas
- · Replies 5 ·
Problem related to Archimedes' Principle and Buoyancy
- Bl4nk
- · Replies 22 ·
Angular deceleration of a circular saw blade
- Tikki
- · Replies 4 ·
Acceleration of a suitcase in an accelerating train after getting pushed
- String theory guy
- · Replies 5 ·
How do you find the maximum angle for a leaning ladder before it tips?
- TheRealSJ
- · Replies 9 ·
Calculating the Center of Mass of a Uniform Thin Hoop Using Symmetry
- String theory guy
- · Replies 7 ·
Q：Hydrostatic Pressure vs. Energy Conservation Equation
- tracker890 Source h
- · Replies 21 ·
What Causes the Different Paths of Projectiles and Planets Under Gravity?
- anuragchakraborty181
- · Replies 13 ·
Can block 2 pull the rod in this two-mass system?
- String theory guy
- · Replies 7 ·
Newton's Third Law for book on a table
- String theory guy
- · Replies 8 ·
Why assume uniform conductivity in current models
- member 731016
- · Replies 5 ·
Integrating Biot-Savart Law at a point
- member 731016
- · Replies 18 ·
Electric Field of a Uniform Ring of Charge
- member 731016
- · Replies 28 ·
Experiment - how temperature changes along a tube, using heaters
- Rezex124
- · Replies 14 ·
Speed of Current in a coaxial cable
- Kyuubi
- · Replies 1 ·
How could the discrepancy be reduced between the two readings?
- vcsharp2003
- · Replies 10 ·
Current on Infinite Periodic LC Circuit
- Kyuubi
- · Replies 2 ·
Buoyant force acting on an inverted glass in water
- MatinSAR
- · Replies 79 ·
Kinematics in Two Dimensions (Monkey and Hunter Thought Experiment)
- griffin_neal
- · Replies 3 ·
Why does less dense air rise and more dense air come down?
- vcsharp2003
- · Replies 18 ·
Falling stick problem (no friction): What is the kinetic energy?
- phos19
- · Replies 3 ·
Angle between proton velocity and B-field
- member 731016
- · Replies 2 ·
Impact force of model rocket with parachute
- LT72884
- · Replies 17 ·
How do I find the normal force?
- Gamerex
- · Replies 16 ·
Weird Thing About Coriolis Acceleration and Coriolis Force?
- NTesla
- · Replies 29 ·
Dimensional Analysis: Forster Energy Transfer equation
- HAYAO
- · Replies 2 ·
Magnitude of external electric force on electric dipole
- member 731016
- · Replies 13 ·
Oscillation of bead with gravitating masses
- Penny57
- · Replies 5 ·
A ball is dropped from the top of a 55.0 m high cliff
- sunnyday
- · Replies 8 ·