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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Introductory relativity question
- CAF123
- · Replies 5 ·
Why does pulling dumbbells inward increase angular speed and kinetic energy?
- Bashyboy
- · Replies 17 ·
Error propagation of q=mcdeltat
- Duderonimous
- · Replies 1 ·
Rolling wheel elastic collision with velocity reversal
- pious&peevish
- · Replies 8 ·
Simple Newton's 2nd Law problem Why isn't this answer right, though?
- Lo.Lee.Ta.
- · Replies 10 ·
Difference between e/E and U in Ohm's law for receivers and generators
- Mohamad&Issa
- · Replies 3 ·
Horizontal Spring Pulled from Equilibrium?
- riseofphoenix
- · Replies 1 ·
Are these three things DEPENDENT on Amplitude?
- riseofphoenix
- · Replies 2 ·
Two dipoles on an axis. There is one point where the E field vanishes.
- _Chemicals_
- · Replies 4 ·
Inelastic Collision: Cart of Mass m Hits Stationary Cart of Mass 2m
- Lo.Lee.Ta.
- · Replies 2 ·
Does a helium balloon tilt when a bus accelerates?
- rbwang1225
- · Replies 14 ·
Average force to keep something in place during an automobile crash?
- katiecrapps
- · Replies 4 ·
How Is the Amplitude Calculated in a Damped Spring-Mass System?
- mcafej
- · Replies 1 ·
Frequency of Oscillation of a Mass on a Vertical Spring
- cbasst
- · Replies 7 ·
Circular Motion (ratio of velocities)
- Qualenal
- · Replies 1 ·
Finding final velocity using energy conservation with initial height and speed
- riseofphoenix
- · Replies 8 ·
Conceptual Problem in rotating cone problem
- WannabeNewton
- · Replies 16 ·
Determining the atomic number, mass number, and chemical name during beta decay
- Hannah1
- · Replies 5 ·
Conservation of Energy (Kinetic and Potential Energies)
- Pappers08
- · Replies 4 ·
Calculating Projectile Height Using Law of Gravitation
- majormaaz
- · Replies 6 ·
Pressure of Helium inside a balloon floating in air
- yaylee
- · Replies 2 ·
Minimum speed for passenger to catch train starting 6.0 s ahead
- Violagirl
- · Replies 4 ·
Why does kinetic energy differ for different masses moving the same distance?
- riseofphoenix
- · Replies 3 ·
Converting binding energy of an element to joules
- Hannah1
- · Replies 3 ·
Calculate the speed of a proton given its kinetic energy
- Hannah1
- · Replies 18 ·
Truck vs car collision: force, impulse, momentum and deceleration
- urbano
- · Replies 3 ·
Calculating Equilibrium Mass in a Pulley System
- twerkit
- · Replies 6 ·
Center of mass after particles move
- codems5
- · Replies 2 ·
The speed at which a proton strikes the positive plate (uniform electric field).
- _Chemicals_
- · Replies 5 ·
Answer to an SHM Problem Does Not Fit Into Original Situation
- modulus
- · Replies 3 ·
Isotope Half-Life and Sample Size Calculation
- AryRezvani
- · Replies 5 ·
Finding coefficient of kinetic friction from normal force and tension
- riseofphoenix
- · Replies 9 ·
How is Force Related to Acceleration and Mass?
- urbano
- · Replies 6 ·
Find the tension T of the two blocks. I think I'm doing something wrong
- riseofphoenix
- · Replies 2 ·
Ball bouncing off moving plank collision problem
- penguinnnnnx5
- · Replies 1 ·
Accelerating Incline - Conditions to prevent slipping
- Pi-Bond
- · Replies 3 ·
Basic theory behind conservation of momentum and impulse.
- theBEAST
- · Replies 5 ·
Kinetic energy involving angular momentum and inertia
- penguinnnnnx5
- · Replies 9 ·
A hard question from the Oxford interview
- Negi Magi
- · Replies 2 ·
An inclined plane, a pulley, and three masses
- smashd
- · Replies 3 ·
Finding spring constant of hung mass
- serverxeon
- · Replies 5 ·
Find the Y component of the Center of Mass
- johnnyboy53
- · Replies 5 ·
Max value of the average normal stress in the links.
- theBEAST
- · Replies 1 ·
Fining the force constant of a spring
- Crbeach
- · Replies 7 ·
By how many volts is the battery 'loaded down'?
- a_patel32
- · Replies 10 ·
How Do I Solve This Kinematic Equation Problem with Gravity?
- riseofphoenix
- · Replies 7 ·
Work for pumping out a halfsphere
- StandUpGuy
- · Replies 1 ·
Relativity - Time Dilation - Solving for t
- PeachBanana
- · Replies 11 ·
Pellet colliding with hanging mass example. Having trouble finding height.
- folsomfighter
- · Replies 1 ·
Deriving Rocket's position from acceleration.
- ShizukaSm
- · Replies 4 ·
Solve the Res-monster Maze in Minutes!
- sai2020
- · Replies 13 ·
Currently studying for finals, with torque
- penguinnnnnx5
- · Replies 2 ·
Conductive heat transfer through basement wall
- omc1
- · Replies 3 ·
Heat rate flow through bar? and thermal conductivity
- omc1
- · Replies 14 ·
General Lens Question: Diverging or Converging
- digipony
- · Replies 2 ·
Barrel lowered by rope and pulley: finding torque and pivot point
- albert.c.16
- · Replies 6 ·
Increase Of Rotational Inertia While Motion Occurs
- Bashyboy
- · Replies 3 ·
Minimum ice slab volume for person to stand on without sinking
- mwalter
- · Replies 8 ·
Calculating Work Energy Input for Compressing Air in a Piston-Cylinder Assembly
- freshbox
- · Replies 3 ·
What is the equation for heat loss due to viscosity in a viscid fluid?
- peripatein
- · Replies 13 ·
Optics problem (myopia, glasses)
- tomkoolen
- · Replies 5 ·
Dropping springs (in free fall) and hoberman ball
- katzzx
- · Replies 1 ·
Biot-Savart Law- magnetic field produced by single wire.
- howsockgothap
- · Replies 1 ·
What is the Voltage Between Point B and Point C in this Circuit?
- tomkoolen
- · Replies 1 ·
Time it takes for two charges to collide
- jpark31
- · Replies 17 ·
How do you determine current direction at circuit intersections?
- brittydagal
- · Replies 1 ·
Bernoulli's Principle (Possibly involving Venturi's Effect)
- JPOconnell
- · Replies 1 ·
Charge on the Capacitor at a Specific Time
- brittydagal
- · Replies 1 ·
How does tension in a pendulum string vary with time?
- zumi78878
- · Replies 6 ·
Invariant Mass/Inelastic Collision Problem
- demoncore
- · Replies 4 ·
Deriving position from a car's velocity equation.
- ShizukaSm
- · Replies 7 ·
Frictional Forces on a Rotating System and Disk: Understanding Angular Momentum
- NasuSama
- · Replies 5 ·
Finding range and height of bullets when given velocity
- AngryApple
- · Replies 2 ·
Pressure Problem: Calculating Gauge Pressure in a Layered Salad Dressing
- Meowserkitty
- · Replies 3 ·
Maximum Bore Diameter for Axial Tensile Load question
- MMCS
- · Replies 8 ·
Direction of friction for a ball rolling up an incline
- izelkay
- · Replies 5 ·
Finding the Current through Resistors - Kirchoff's Laws?
- shrew
- · Replies 7 ·
Molecular Model of an Ideal Gas Question
- rokr32
- · Replies 1 ·
Three Pulleys 3 masses, find tension
- Purple Grind
- · Replies 4 ·
Calculate the quantum number of an electron given its velocity
- MatrixMan87
- · Replies 3 ·
Finding Gas Mass Using Heat Exchange at Constant Pressure and Volume
- kdndk
- · Replies 1 ·
Finding Period of Pendulum with r, m, L, M
- zumi78878
- · Replies 9 ·
Find the x and y component of an electric field
- warnexus
- · Replies 18 ·
Finding ω and T of a Pendulum With No Numbers
- NilliNilli
- · Replies 5 ·
Damped Oscillator equation - Energy
- Paddyod1509
- · Replies 8 ·
Finding time given positions in SHM
- jstevenson16
- · Replies 5 ·
Calculating Earth's Angular Momentum: A Model of a Uniform Sphere
- Bashyboy
- · Replies 2 ·
Rotational Mechanics Problem again
- thunderhadron
- · Replies 20 ·
Diode circuit analysis with D2 and D3
- Drao92
- · Replies 3 ·
Wavelength from speaker interference pattern with nodes and antinodes
- ppy
- · Replies 1 ·
Determining the speed of sound from a half-open open pipe
- kell
- · Replies 14 ·
Finding the Force on One Point Charge Due to Multiple Point Charges
- PeachBanana
- · Replies 13 ·
Net torque on a beam about point O and point C
- Bashyboy
- · Replies 11 ·
How to build a DC motor from wire and magnets and increase RPM
- 33639
- · Replies 4 ·
How Does Projectile Motion Affect Internal Energy Changes?
- zumi78878
- · Replies 7 ·
Derive an Equation for Period of Ring Pendulum
- Arrhenius7991
- · Replies 11 ·
Why do bubbles in water form perfect spheres?
- sgstudent
- · Replies 4 ·
What Determines the Pressure at Mid-Point in a Siphon Tube?
- utkarshakash
- · Replies 2 ·
How Fast Can Water Flow from a Kitchen Faucet on the Third Floor?
- lch20yy
- · Replies 2 ·
Spring Physics Help: Initial Velocity & Max Accel.
- zumi78878
- · Replies 14 ·