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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Calculating Orbital Velocity and Probe Velocity in a Hohmann Transfer to Neptune
- garyman
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Problem using conservation of angular momentum
- john001
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Calculating the motion of binary stars
- hragsarkissia
- · Replies 2 ·
How Do You Delete an Accidental Forum Post?
- chem_is_lovex
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Inclined plane car out of gas problem
- angeljunti
- · Replies 9 ·
Why does the magnitude of unit vector change equal the angle change in polar coordinates?
- Azorspace
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Calculating Mechanical Energy Change of 1100kg Car
- uno
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Finding coefficient of static friction in half-Atwood system
- Lokhtar
- · Replies 7 ·
Electric field at origin from semi-infinite line charge starting at x=+x₀
- SilverGirl
- · Replies 14 ·
Electric/Magnetic Field Technologies
- temaire
- · Replies 1 ·
Coffee cup blown off car and block launched off platform
- taproot729o6
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Where is the center of mass of the slab
- ganondorf29
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2 people in a canoe, switch places, canoe moves, find mass of one person
- musicfairy
- · Replies 8 ·
Little Nellie Newtons Force Problems
- jawo3
- · Replies 4 ·
AM radio station antenna frequency from quarter-wavelength height
- TLeo198
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Insulator/Conductor Question with picture
- swooshfactory
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Block hits block with spring. COE and COM
- mpaandaa
- · Replies 1 ·
Solving Mass-Acceleration Relationships for Objects Connected with Pulleys
- Geminiforce
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How Is the Resultant Force on a Car Calculated?
- anteaters
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Wavelength, temperature in transition
- akance
- · Replies 1 ·
How Does Throwing a Snowball Affect an Ice Skater's Movement?
- MBURNS001
- · Replies 1 ·
Forces Acting on a Ball: Identifying the Unknowns
- kristibella
- · Replies 1 ·
Capacitance measurement of parallel plate capacitor at 20 kHz
- erik006
- · Replies 4 ·
Was gravity discovered or invented by Newton?
- Kristie29
- · Replies 4 ·
Sol'n: Find Force P to Balance Weight of Blocks A and B
- Melawrghk
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Circular motion/gravitational force implied
- fluidistic
- · Replies 3 ·
Power needed to keep velocity of conveyor belt constant
- diablo2121
- · Replies 1 ·
Tension Equal in Pulley System w/ 2 Strings
- fk378
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Find Center of Mass of Dropped Stones
- musicfairy
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What is the Velocity of the Meteor?
- teababy
- · Replies 17 ·
Thermodynamic Application Isothermal Work
- latitude
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Normal Force Problem: Calculating Magnitudes
- johnson.3131
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Electric force and free electrons
- chem1
- · Replies 4 ·
Elastic Collision and max height on an Incline
- closer
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What Is the Other Force Acting on the Object?
- anteaters
- · Replies 2 ·
Why is acceleration of a cart on an incline divided by sin θ equal to g?
- choyphin
- · Replies 3 ·
How Much Does a Guitar String Stretch Under Tension?
- Jaklynn429
- · Replies 15 ·
What is the Speed of the Center of Mass of Two Moving Particles?
- JJones_86
- · Replies 6 ·
Firecracker explodes into three equal pieces at highest point
- JJones_86
- · Replies 4 ·
Prove that: kinematics/ projectile problem
- jlk
- · Replies 2 ·
Resonance in Electrical Circuit
- just.karl
- · Replies 1 ·
What is the net impulse and average force on a ball caught in hand?
- snoopygal327
- · Replies 5 ·
Difficult Force Problem with changing angle ( )
- DJWise
- · Replies 1 ·
Finding accelration with forces?
- papi
- · Replies 1 ·
How to Calculate Contact Force Between Boxes in Physics?
- papi
- · Replies 1 ·
Torque Equilibrium: Solving f=ma and T=rf
- rphung
- · Replies 3 ·
What Angle Causes an Ice Cube to Detach from a Spherical Bowl?
- aimslin22
- · Replies 3 ·
Simple Harmonic Motion Problem(pendulum)
- JSmith89
- · Replies 3 ·
Calculate Angular Velocity after Star's Diameter Decrease
- Naldo6
- · Replies 1 ·
Calculating the Center of Mass for a CO Molecule
- Naldo6
- · Replies 5 ·
Calculating Velocity of a Wheel at the Top Using Acceleration and Time
- Naldo6
- · Replies 11 ·
Find the expression for the frequency emitted if the source
- grapejellypie
- · Replies 1 ·
How Much Torque Does an Electric Motor Develop at 3000 RPM?
- irun4edmund
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Cannot Lift Piano: Force or Work Not Enough
- keemosabi
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How far behind is the automobile when it reaches a speed of 38.9 m/s?
- bigzee20
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Finding the friction coefficient?
- papi
- · Replies 1 ·
Partially Emptying a Tank Containing an Ideal Gas
- orangbulu
- · Replies 1 ·
Ball dropped on pivoting bar with another ball at the other end
- irun4edmund
- · Replies 6 ·
Conservation of Angular Momentum in Collision with Rotations
- maniacp08
- · Replies 4 ·
Some basic electric potential questions
- kyoko
- · Replies 1 ·
Finding the force (complicated)?
- papi
- · Replies 2 ·
Weight above the surface of the Earth
- Sligh
- · Replies 7 ·
Induced current through a resistor - with variable resistor and two coils
- jcvince17
- · Replies 15 ·
How Does Cutting a Spring Affect Its Angular Frequency?
- JSmith89
- · Replies 2 ·
How High Does a Basketball Bounce After Losing 20% Energy?
- aleferesco
- · Replies 1 ·
Maximum acceleration for block on cart with friction
- PhysicslyDSBL
- · Replies 1 ·
Calculating Time for Overtaking in a Race
- bigzee20
- · Replies 10 ·
Free Fall and gravitational acceleration
- tgilli
- · Replies 2 ·
Interpreting this wave funtion
- RJS
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Graphing Wavelength vs Inverse freq. or Period
- PSEYE
- · Replies 1 ·
Finding Force of friction without having coefficient or normal?
- DDRchick
- · Replies 10 ·
What Are the Physics Behind a Girl Pulling a Sled on Ice?
- hansel13
- · Replies 4 ·
At what angle does a block tip over given its center of mass position?
- Jaklynn429
- · Replies 1 ·
Ball tossed from window at 15° below horizontal
- physics_geek
- · Replies 6 ·
How Is the Force of Sunlight Calculated on a Building's Roof?
- TLeo198
- · Replies 1 ·
Maximum Weight for Stationary System with Static Friction
- burg25
- · Replies 7 ·
Capacitor, Dielectrics and height movement
- TFM
- · Replies 32 ·
How Do I Solve These Physics Problems for My Exam Tomorrow?
- B Serious
- · Replies 11 ·
How do the blocks of power have the same kinetic energy?
- soupastupid
- · Replies 5 ·
Hang time, range, maximum height
- itsmarasilly
- · Replies 4 ·
Blocks on Floor - Tension between blocks
- PhysicslyDSBL
- · Replies 6 ·
Force and Motion Electron Problem
- hansel13
- · Replies 5 ·
Finding final position from work done by variable force
- lucky_star
- · Replies 12 ·
How Is Acceleration Calculated When a Car Changes Direction But Not Speed?
- possum30540
- · Replies 1 ·
What Is the Moment of Inertia and Frictional Torque of a Rotating Wheel?
- maniacp08
- · Replies 4 ·
What Is the Resultant Speed After Two Birds Collide?
- drewdiddy
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Police car catching a speeder with constant acceleration
- bigzee20
- · Replies 3 ·
How Is Power Related to Aerodynamic Drag in Cycling?
- shimizua
- · Replies 2 ·
Tension with a with a massless rope
- kbka
- · Replies 3 ·
What Do Others Think About Determinism?
- Steph191290
- · Replies 4 ·
Calculating Position from Acc. Time Graph
- bigzee20
- · Replies 2 ·
Why is power dissipation P=F*V and not P=Cd(A²)(v³)?
- soupastupid
- · Replies 3 ·
Calculating Landing Distance on an Aircraft Carrier
- bigzee20
- · Replies 3 ·
Speedboat Acceleration Question
- aquapod17
- · Replies 2 ·
How Do You Calculate the Moment of Inertia of a Cone?
- ehilge
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What is the magnitudue of the force acted on the ball
- knelson
- · Replies 4 ·
Rotating Record Frequency Calculation
- marnold1987
- · Replies 6 ·
Confusion regarding electrical power
- nokia8650
- · Replies 1 ·
What is the relationship between thrust and density in a half-submerged object?
- nokia8650
- · Replies 4 ·
Momentum and the Conservation Laws
- closer
- · Replies 1 ·