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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Solving a Truss: Methodial of Joints
- NoobeAtPhysics
- · Replies 3 ·
How Does Collision Time Affect Impulse and Momentum Change?
- Sylis
- · Replies 3 ·
Need some advice on uncertainties
- lemonysage
- · Replies 6 ·
Finding orbital velocity, period, and energy of a planet around a star
- Psyguy22
- · Replies 6 ·
Finding light paths in a mirrored square room using virtual images
- PintoCorreia
- · Replies 4 ·
Virtual cells created by repeated mirror reflections
- PintoCorreia
- · Replies 4 ·
How Do You Calculate Coulomb's Law in 3-D?
- nadiaz
- · Replies 6 ·
Finding braking force needed to stop a 1500kg car in 50m
- Apothem
- · Replies 1 ·
Using SUVAT and Newton's Second Law
- Apothem
- · Replies 13 ·
Bead sliding down a frictionless spiral: energy and angular momentum
- PhysicsKid0123
- · Replies 15 ·
Angular distance when hand moves twice the radius on steering wheel
- randomjunebug
- · Replies 2 ·
Are these statements always true for LCR circuits?
- BMW
- · Replies 1 ·
Finding the Magnitude and Placement of Force F for a Loading System
- bigu01
- · Replies 2 ·
Which virtual cells look the same as the basic cell?
- PintoCorreia
- · Replies 4 ·
How Is Angular Momentum Calculated in a Pulley System?
- fogvajarash
- · Replies 6 ·
Virtual source at the back of the mirror
- PintoCorreia
- · Replies 12 ·
Find mass of black hole in center of galaxy given eccentricity+
- oddjobmj
- · Replies 2 ·
Relation between mirror angle and light ray deflection angle
- PintoCorreia
- · Replies 1 ·
Acceleration of a hanging mass
- chillpenguin
- · Replies 2 ·
Torque on disk with three forces at different positions
- Zeus5966
- · Replies 7 ·
Atwood machine with two ropes on one of the blocks
- physiccs
- · Replies 1 ·
Mass shot into orbit; find max distance from Earth
- oddjobmj
- · Replies 3 ·
Why doesn't the car speed up when rocks fall through a hole in the floor?
- sinclair18
- · Replies 6 ·
Calculating the friction on a curved path
- PhyIsOhSoHard
- · Replies 19 ·
Projectile Kinetic Energy Calculation
- oneplusone
- · Replies 2 ·
Spring stiffness for garage door to stop at vertical position
- naynaitmus
- · Replies 6 ·
Solving Frequency of Harmonic Wave Problem
- zhartman
- · Replies 1 ·
What is the Height at Which a Falling Ball Reaches a Velocity of 5.2 m/s?
- maddief
- · Replies 2 ·
Finding heat gained by water when hot metal is placed in it.
- astru025
- · Replies 9 ·
Can light rays pass through a bird in a mirror reflection setup?
- PintoCorreia
- · Replies 7 ·
Independent system displacement variables
- princejan7
- · Replies 1 ·
Question in (Conduction ) A steel plate 2 cm thick
- manal950
- · Replies 2 ·
Suppose a human could live for two hours (120 minutes ) unclothes in a
- manal950
- · Replies 3 ·
Question combined mode radiation and convection ?
- manal950
- · Replies 5 ·
Deriving diffraction grating equation for light at oblique incidence
- Dgray101
- · Replies 3 ·
A radiator in a domestic heating system operates at a surface temperat
- manal950
- · Replies 7 ·
Simple problem involving pulley with mass
- Saitama
- · Replies 7 ·
Conservation of angular momentum in an inelastic collision?
- mot
- · Replies 5 ·
How Is the Net Gravity Force Calculated Between Earth, Moon, and a Rocket?
- The Subject
- · Replies 16 ·
Capacitors, potential difference, electric displacement
- izzy93
- · Replies 1 ·
Can Momentum Save an Astronaut 200m Away from the ISS?
- MathewsMD
- · Replies 1 ·
Solving Kepler's Third Law for Period - 6.7E6m
- KVat390
- · Replies 11 ·
Why period is half ? Spring problem
- k31453
- · Replies 5 ·
Electric flux passing through a plane
- ViolentCorpse
- · Replies 2 ·
Can you use the mirror image of either object to find the light path?
- PintoCorreia
- · Replies 5 ·
Internal vs external force - conservation of momentum in one dimension
- letoiledemer
- · Replies 2 ·
Deriving Equation of Reduced Mass W/ Angular Momentum
- Dgray101
- · Replies 11 ·
Waterfall Question Work and Energy
- Arythmatic
- · Replies 2 ·
Interpreting a banked circular motion question
- BOAS
- · Replies 5 ·
Computing flux through a sphere with cylindrical coordinates
- bowlbase
- · Replies 6 ·
How Much Pressure Is Needed to Launch a Marble at 5 m/s?
- Fifty
- · Replies 3 ·
Two boats and passenger speed problem check
- YummyPotato
- · Replies 3 ·
EMF induced in coil by magnetic field
- iRaid
- · Replies 15 ·
How much work is done when carrying a load up a set of stairs?
- Blonde1551
- · Replies 2 ·
How Does a Grapefruit Affect Spring Compression?
- physicsdb
- · Replies 3 ·
Surface Tenstion in Water (Needle resting on water)
- FaraDazed
- · Replies 4 ·
Accelerating Beaker containing liquid
- andyrk
- · Replies 3 ·
How Can I Prove This Complex Fraction Equation?
- spiruel
- · Replies 2 ·
Circular Motion with static friction
- NickyQT
- · Replies 2 ·
Estimating convergence of GRACE twin-satellites due to gravitational mass
- jacmacg
- · Replies 7 ·
Why is this line of reasoning wrong?
- mjordan2nd
- · Replies 5 ·
Optic fibers atenuation problem
- Jalo
- · Replies 1 ·
How Do Accelerations and Angular Acceleration Relate in a Disk and Mass System?
- Saitama
- · Replies 23 ·
Solving Fresnel Coefficient Equations
- Dassinia
- · Replies 3 ·
How Much Water Can a Freezer Turn to Ice in One Hour?
- soccer4life
- · Replies 4 ·
Deducing Number of Molecules in a Scuba Tank
- aerograce
- · Replies 2 ·
Transition in magnetic refrigeration
- CAF123
- · Replies 1 ·
Drawing position, velocity and acceleration vectors for circular motion
- toljin123
- · Replies 1 ·
Directions of (electro)magnetic fields/application of right hand rule
- chris69
- · Replies 4 ·
Is momentum conserved when a woman throws a rock on ice?
- overtak3n
- · Replies 6 ·
What is the speed of a mass on a spring at a displacement of 0.2 m?
- CabalGroupie
- · Replies 4 ·
Greatest Force without causing the rod to slip
- frownifdown
- · Replies 13 ·
Energy content of gasoline and hydrogen comparative math question
- courtneywetts
- · Replies 36 ·
Wavefunction with specific values
- Gringema
- · Replies 1 ·
Converting waste energy output to average power and coal plant equivalents
- mz19
- · Replies 6 ·
Two Transformers, voltage before and after on two different coils
- codytanner16
- · Replies 1 ·
Computing net Moment of Intertia
- Nicolaus
- · Replies 7 ·
Period of Oscillation for vertical spring
- conniebear14
- · Replies 3 ·
Drag force increasing as square of velocity for a car
- dizweld
- · Replies 27 ·
Kinematics: when will the two cars meet?
- get_physical
- · Replies 19 ·
Graphing the Curl of -Cx\vec{z} on the xz plane
- scorpius1782
- · Replies 1 ·
Calculating Uncertainties of Measured quantities (Physics)
- Joystar77
- · Replies 10 ·
What is the average force of gravity between Earth and the moon?
- snakeboy91
- · Replies 2 ·
What is the Kinetic Energy of a Rotating Square Mass-Spring System?
- proximaankit
- · Replies 2 ·
Bond energy between two water molecules
- FaraDazed
- · Replies 3 ·
How Is the Temperature of an Asteroid Between Mars and Jupiter Calculated?
- courtneywetts
- · Replies 2 ·
Electrical Field around Spherical Ball at origin
- Philosophaie
- · Replies 2 ·
Finding specific heat capacity of a non-monatomic (ideal gas)
- BOAS
- · Replies 2 ·
Rotational Kinematics: Slowing Down Turntable
- hb20007
- · Replies 5 ·
Electronics, Wheatstone bridge, with a twist.
- brokenbarbie
- · Replies 3 ·
Calculating Work for a Bead on a Square Loop in an Electric Field
- scorpius1782
- · Replies 8 ·
How Much Energy and Money Does Switching to a Compact Fluorescent Lamp Save?
- mz19
- · Replies 4 ·
Finding change in internal energy
- BOAS
- · Replies 2 ·
What Happens to Primary Voltage if 8V is Applied to Secondary Coil?
- vroomba03
- · Replies 1 ·
Multiloop circuit analysis with Kirchhoff's rules gives wrong currents
- PhizKid
- · Replies 17 ·
Dynamics question regarding moment of inertia
- chicagobears34
- · Replies 1 ·
Constant power acceleration: speed and position at 6.0s
- sofiasherwood
- · Replies 11 ·
Block falling from pulley: finding speed after 0.43 m
- frownifdown
- · Replies 7 ·
Distance travelled of block, friction, forces
- johnnnnyyy
- · Replies 6 ·