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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Equilibrium Formula Derivation for Torque and Lever Systems
- pinky2468
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Calculate Tension: Mass, Examples, How To
- preet
- · Replies 3 ·
Question on Photoelectric effect
- stunner5000pt
- · Replies 7 ·
Solve Superman Problem: Stop Train in <1 hr
- SnowOwl18
- · Replies 2 ·
How Do Newton's Laws Apply in Calculating Contact Force Between Boxes?
- pulau_tiga
- · Replies 2 ·
Calculating Laser Beam Power and Wave Crests per Second at 632.8nm Wavelength
- stunner5000pt
- · Replies 3 ·
Calculating Electron Revolutions per Second in Electric Force Field
- guru
- · Replies 2 ·
Arghhh Coordinate geometry question
- ultraviolent
- · Replies 3 ·
What Determines Points of Zero Net Electric Potential Between Charged Particles?
- rishid
- · Replies 2 ·
Work done by hamster to accelerate exercise wheel
- Hughey85
- · Replies 2 ·
Find Min Distance from x=20 to y=3√(x-15)
- buffgilville
- · Replies 2 ·
Find the constant of vain (wien)
- stunner5000pt
- · Replies 5 ·
How Do You Solve a Frictionless Collision Where Two Masses Stick Together?
- justinbaker
- · Replies 3 ·
Find the temperature and total radiancy of star
- stunner5000pt
- · Replies 3 ·
3-dimensional potential energy problem
- winhog
- · Replies 8 ·
How Do You Find Tangent Lines to a Parabola Through a Given Point?
- Lilly
- · Replies 2 ·
How Does Air Density, Speed, and Cross-Sectional Area Affect Resistive Force?
- CamDaBballer11
- · Replies 2 ·
Finding planes whose intersection is a normal line
- Lomion
- · Replies 1 ·
Calculating Velocity and Direction of a Sailboat After a Sudden Gust of Wind
- viendong
- · Replies 4 ·
Can You Prove Conservation of Energy in Vertical Stone Throwing?
- jenavira
- · Replies 8 ·
How Much Should a Golfer Increase the Putt Speed to Overcome Grass Resistance?
- buffgilville
- · Replies 2 ·
Finding the Mass of a Second Block in a Spring Equilibrium Problem
- BlackMamba
- · Replies 11 ·
Cartesian and Polar Coordinates
- Poweranimals
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Drag and time to slow down -__-
- FancyNut
- · Replies 12 ·
Total internal reflection at all angles in a 45-90-45 prism
- Normania
- · Replies 1 ·
Solving Momentum in Inelastic Collisions
- buffgilville
- · Replies 2 ·
Bullet passing through first block then embedding in second block
- SnowOwl18
- · Replies 2 ·
Understanding kN in Torque Problems
- Enoch
- · Replies 4 ·
Finding acceleration of 100g and 120g masses on a pulley
- chathamchick
- · Replies 3 ·
Solving 36 = 49s²
- punk_rawk_jazz
- · Replies 2 ·
Energy, Work and circular motion
- quick
- · Replies 2 ·
Time for a 53 kg object to fall from 40 m?
- Turkish
- · Replies 4 ·
Calculating Plumb Bob Deviation at 35 Degrees North Latitude
- evman150
- · Replies 3 ·
Limits and choosing an epsilon properly?
- matrix_204
- · Replies 7 ·
Finding the minimum volume plane through (2,3,4) using Lagrange multipliers
- circa415
- · Replies 7 ·
How can reference frames help solve problems involving velocities and distances?
- Warwick
- · Replies 2 ·
Calculating Maximum Volume of Sand in a Circular Area
- winlinux
- · Replies 2 ·
Determine the initial vertical reaction
- jjiimmyy101
- · Replies 2 ·
General Relativity tensor proof
- regretfuljones
- · Replies 2 ·
Can You Express z in Terms of x and y to Minimize Volume in the First Octant?
- circa415
- · Replies 2 ·
Two numbers with difference 30 and minimum product
- EvilPony
- · Replies 4 ·
Proving a tensor property in all coordinate systems
- regretfuljones
- · Replies 2 ·
Solving Physics Puzzle: Hockey Puck Collision
- RussG
- · Replies 2 ·
Sum of reciprocals of numbers with only factors 2 and 3
- Kenshin
- · Replies 2 ·
Analysis Problem (finding a derivative)
- AKG
- · Replies 2 ·
How Can I Solve a Physics Problem with Poor Instruction?
- suf7
- · Replies 4 ·
How Does Current Direction Affect Magnetic Force on a Conductor?
- ACLerok
- · Replies 14 ·
Physics Hwk. Problem: Center of Mass
- shawonna23
- · Replies 2 ·
Why Is Knowing the Mass and Charge of an Electron Important?
- Dutch
- · Replies 2 ·
Finding Equilibrium: Solving for Unknown Forces and Angles in a Particle System
- jamie_o
- · Replies 5 ·
Solving for Speed of Mass After Spring Compression: .15m
- Lorbersf
- · Replies 3 ·
How Does Entropy Change in an Isothermal Compression of an Ideal Gas?
- Nylex
- · Replies 4 ·
What Are the Dimensions to Minimize Fence Length for a 384 ft² Study Area?
- jenc305
- · Replies 2 ·
Doofy Spring constant problem problem
- Supaiku
- · Replies 3 ·
How Many Electrons Are in 1 Kg of Water?
- joej
- · Replies 2 ·
Why are there maxima at both crest and trough interference in two-slit experiments?
- saltrock
- · Replies 2 ·
Wood block coeffiecent of friction
- Frosty_TAW
- · Replies 2 ·
Calculating Electric Force: 6.20 * 10^-2 N
- punjabi_monster
- · Replies 2 ·
Solving Newton's Law: Calculating Acceleration and Force in a Pulley System
- newcool
- · Replies 2 ·
Velocity of wood block down an incline
- FancyNut
- · Replies 21 ·
What is the final temperature of a mixture of steam and ice?
- mickeychief
- · Replies 2 ·
Physics HWK: Avoid Injury w/Stiff-Legged vs. Bent-Legged Landings
- shawonna23
- · Replies 2 ·
Understanding Simple Harmonic Motion: FAQs and Examples
- buffgilville
- · Replies 3 ·
Can you solve the strange derivative of this complex function?
- thennigar
- · Replies 3 ·
Potential and Kinetic energy and a sled
- Red04Cobra
- · Replies 3 ·
Finding S4N4 structure and bond enthalpy with equal bond lengths
- needhelpperson
- · Replies 2 ·
Projectile Motion of a football
- smartins16
- · Replies 2 ·
Does {t + 1, t² + 1, t² - t} span the space of polynomials of degree 2 or less?
- Spectre5
- · Replies 14 ·
How can I draw angles using just a ruler and compass?
- Dooga Blackrazor
- · Replies 4 ·
Flow speed in air duct and heating energy for diatomic gas
- mickeychief
- · Replies 2 ·
Vector cross products involving magnetic forces
- ACLerok
- · Replies 15 ·
Prove Cauchy Sequence: {sn} from {tn}
- tink
- · Replies 2 ·
Calculating Equilibrium Temperature of Blacktop Road Under High Noon Radiation
- andrew410
- · Replies 4 ·
Can Rhodium Achieve a Noble-Gas Electron Configuration?
- needhelpperson
- · Replies 2 ·
What is the speed of the third fragment in an exploding object problem?
- SnowOwl18
- · Replies 2 ·
In a book it also says g(x) h(x) etc what does it mean?
- roger
- · Replies 13 ·
Spherical shell of charge / electron
- Zaphodx57x
- · Replies 2 ·
Boat losing mass while shoveling sand perpendicular to motion
- emob2p
- · Replies 2 ·
Elevator problem with safety rails, spring, and a snapping cable->
- VinnyCee
- · Replies 26 ·
Turbulent drag force equation for area, speed and density
- Try hard
- · Replies 2 ·
Solving for the New Speed of a Brick on a Waxed Plank
- meh6287
- · Replies 2 ·
Use differentials to estimate the maximum possible error
- circa415
- · Replies 6 ·
Charges on Conductors and Gauss's Law
- crazynut52
- · Replies 2 ·
Tide, Further 2 my post yesterday on tough integration
- alonzo
- · Replies 2 ·
How Does Quadrupling the Distance Between Charges Affect Electrostatic Force?
- fishboy39
- · Replies 2 ·
Induced current in stretched square loop in magnetic field
- JamesL
- · Replies 2 ·
Integrating vector function r(t) = <e^t, cost, sint> from π to 0
- crazynut52
- · Replies 2 ·
How Do You Calculate the Change in Kinetic Energy for a Block on an Incline?
- ballahboy
- · Replies 5 ·
What are the solutions for these momentum/impulse problems?
- DLxX
- · Replies 5 ·
What Is the Coefficient of Kinetic Friction for a Two-Mass System on an Incline?
- ballahboy
- · Replies 2 ·
Finding a formula for a block sequence pattern
- debrawallenger
- · Replies 9 ·
How to Solve for Distance and Time in Rotational Motion Problems
- doxigywlz
- · Replies 5 ·
Finding the length of rough ice patch using work-energy theorem
- kingsean
- · Replies 3 ·
Frictionless inclined plane problem
- Strelka
- · Replies 2 ·
What problems arise when marbles don't collide at their centers of mass?
- buffgilville
- · Replies 2 ·
If the coefficient of kinetic friction is 0.15 find the tension in the string.
- mickeychief
- · Replies 2 ·
Calculating the Height of a Swinging Man on a 24m Building with a 24m Rope
- Physics_Noob
- · Replies 2 ·
What is the Magnitude of Average Force Due to Air Resistance?
- IShouldBSurfing
- · Replies 3 ·
Doppler Effect: Source vs Detector Motion
- colonel
- · Replies 2 ·