Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Threads
What is the tension in the rope holding a helium-filled balloon at a party?
- awertag
- · Replies 7 ·
Ellastic collision between a frame and projectile
- Rosengrip
- · Replies 7 ·
Finding speed of collar B in rigid body linkage with velocity constraints
- Telemachus
- · Replies 2 ·
Circular Motion Regarding Car Sliding on a Curve
- Neek 007
- · Replies 3 ·
How to Derive the Oscillation Period of Water in a U-Tube?
- newtn46
- · Replies 7 ·
Calculating Maximum Deceleration of Re-entry Capsule
- spacemike1
- · Replies 4 ·
Centrifuge for astronaut training (tangential and normal acceleration)
- badaboom
- · Replies 26 ·
Refraction of Light: Isosceles Prism of 120°, Refractive Index 1.44
- harsh95
- · Replies 1 ·
Average force by ball on floor
- vissh
- · Replies 15 ·
Projectile with same initial and final height, and moon landing free body diagram
- narutodemonki
- · Replies 3 ·
Optics, interference, very unusual problem
- fluidistic
- · Replies 16 ·
Calculate Work Done by 12.6V Battery Supplying 2.0A for 10min
- sgoeke
- · Replies 1 ·
Which Photon Energy Can Overcome a 3.00 eV Work Function?
- sgoeke
- · Replies 10 ·
Capacitors in Series: Find Q on 1.0 μF Capacitor
- sgoeke
- · Replies 2 ·
What Path Do Particles Take in an Inelastic Collision?
- AntMantis
- · Replies 3 ·
Calc Volume Flow Rate of Water from Tap (45mm ht)
- coltsamuel96
- · Replies 8 ·
How do I solve for v0 from two equations with v and h?
- coltsamuel96
- · Replies 2 ·
Minimum velocity change to lower shuttle altitude to 60 miles
- wahoowa2012
- · Replies 1 ·
Integrating √(9X^4 + 9X^2) by substitution
- superkam
- · Replies 3 ·
Heat Generation in a circuit due to moving charges
- deepak-
- · Replies 2 ·
Finding the Center of Mass for a Loaded Ferryboat on a Square Raft
- fiziks09
- · Replies 8 ·
Why Does Pressure Decrease When Velocity Increases in a Constricted Pipe Area?
- acidandroid
- · Replies 3 ·
SHM and hole through the center of the Earth
- astenroo
- · Replies 8 ·
Keplerian beam expander output diameter?
- cdotter
- · Replies 4 ·
Thermodynamics 1st Law: reversible process for batteries?
- sparkle123
- · Replies 1 ·
Final temperature when 10 kg zinc at 68°C is added to 32 kg water at 14°C
- DrMcDreamy
- · Replies 3 ·
How many wavelengths are there now in one pulse?
- ravsau
- · Replies 1 ·
Finding position of oscillating particle at t=0.250 s from x=4.00 cos(3.00πt+π)
- MJay82
- · Replies 2 ·
Why does the last term detract from acceleration?
- Peter G.
- · Replies 4 ·
How Do You Calculate Tension and Force Components in a Supported Beam Scenario?
- emerica1254
- · Replies 11 ·
How Do First Class Levers Apply to Scissors?
- Peter G.
- · Replies 2 ·
Simple centrifugal force problem
- antonio glez
- · Replies 9 ·
Radioactive Decay: Proving Effective Half-Life of Nucleus
- roshan2004
- · Replies 4 ·
Centripetal force with circular motion
- catch-22
- · Replies 5 ·
Spring Problem- Unknown mass and constant
- C_Conrad8
- · Replies 1 ·
How much heat is needed for converting 7 kg of ice to steam?
- DrMcDreamy
- · Replies 6 ·
How to Calculate Spacing for Bridge Expansion with Linear Expansion Coefficient
- DrMcDreamy
- · Replies 5 ·
What is the displacement of a critically damped forced harmonic oscillator?
- Eggmans
- · Replies 1 ·
Doppler shift of absorption line from distant galaxy
- Airman
- · Replies 2 ·
Displacement crossed with velocity?
- Maybe_Memorie
- · Replies 1 ·
Movement in one and two dimensions, where finding Force in a problem
- Vinhster
- · Replies 2 ·
Momentum of exhaust gases and thrust from a 20,000kg rocket
- Spakfilla
- · Replies 1 ·
Does a pulse invert when reflecting into a faster medium?
- hss15
- · Replies 1 ·
Tangential force applied on a disc
- ebelviranli
- · Replies 3 ·
Neutron density for indium with isotope abundance
- matt222
- · Replies 1 ·
Speeds of waves in different media.
- hss15
- · Replies 2 ·
How Much Energy Does It Take to Boil 3 Liters of Water?
- northh
- · Replies 3 ·
How Do You Calculate Orbital Radius and Velocity for Different Orbital Periods?
- SuperNubCake
- · Replies 3 ·
Coefficient friction between a toboggan and the snow
- nasadall
- · Replies 1 ·
Cons. of momentum: person moves at angle atop free-to-move cart
- strangeeyes
- · Replies 2 ·
Figuring out angular velocity from θ = 2.0 + 4.0t^2 + 2.0t^3
- Stonem42
- · Replies 1 ·
What Is the Speed of Particle Q After the Collision?
- nasadall
- · Replies 3 ·
Impulse from a ball bouncing off a wall
- nasadall
- · Replies 7 ·
Spring question, how do I know it is negative or positive?
- flyingpig
- · Replies 5 ·
What is the minimum height of the bag needed for glucose infusion?
- DrMcDreamy
- · Replies 6 ·
Charge in a spherical conducting shell
- Markv
- · Replies 3 ·
Calculating Rotational Inertia and Yo-Yo Acceleration
- atm1993
- · Replies 1 ·
How Do You Calculate Velocities for a Hohmann Transfer Orbit?
- hb243
- · Replies 1 ·
Work to Construct Conducting Spheres
- Ferbs207
- · Replies 1 ·
Atomic/molecular level definition/description of density.
- TFGordon
- · Replies 2 ·
Finding friction force on a 800kg dragster accelerating to 350 km/h
- chengbin
- · Replies 1 ·
Gauge pressure at different depths in a 56 m reservoir behind a dam
- DrMcDreamy
- · Replies 5 ·
Location (x,y) when a Projectile Collides with a Slanted Wall
- Mator
- · Replies 15 ·
Calculating Gauge Pressure at the Bottom of a Test Tube
- DrMcDreamy
- · Replies 5 ·
Height of horizontal force on billiard ball given velocity change
- ippo90
- · Replies 5 ·
Acceleration due to gravity on a planet's surface
- cary5
- · Replies 11 ·
Problem involving static equilibrium
- issacnewton
- · Replies 10 ·
Unsolvable Puzzle: Can a Puck Stop in 0.42s?
- chengbin
- · Replies 2 ·
What is the mass of this object?
- chengbin
- · Replies 3 ·
Stopping in min. distance[friction]
- vissh
- · Replies 5 ·
Why doesn't a ball slow down when it hits a heavy wall?
- tennishaha
- · Replies 11 ·
What is the angle of incidence and reflection when facing a plain mirror?
- Help4458
- · Replies 1 ·
Transforming Four-Momentum between Inertial Frames
- Twoism
- · Replies 1 ·
Asteroid at 0.9c colliding with Earth in 2 hours
- rainbow90
- · Replies 3 ·
Finding torque/tension in pulley/block system.
- SteelDirigibl
- · Replies 4 ·
How Do You Solve the Diffraction Intensity Problem with Different Units?
- Precursor
- · Replies 4 ·
True or false: tennis sweet spot, altitude, mechanical advantage, power
- firyjade12
- · Replies 1 ·
Determining the Equation for an Underdamped Oscillating System
- trautlein
- · Replies 4 ·
Angular momentum; flying motorcycle
- MrRice5555
- · Replies 2 ·
Possible frequencies of an electron
- aurao2003
- · Replies 13 ·
Theoretical Question: Mass of Earth
- jmb88korean
- · Replies 2 ·
Time for capacitor voltage to reach 80% in RC circuit with parallel capacitors
- rickstar008
- · Replies 5 ·
Many car calculations, including torque and peak power
- SoftwareEng
- · Replies 1 ·
I cant seem to get this angular velocity problem right
- xxxixpats
- · Replies 2 ·
How Do You Calculate Changes in Gravitational Force and Weight?
- Neek 007
- · Replies 12 ·
Newton's 3rd Law Chair situation
- wooker
- · Replies 1 ·
Work Done by Friction Force: A 4.0 kg Block
- IKonquer
- · Replies 2 ·
Calculating Pressure and Steam Jet Velocity in a Boiling Pot
- tweety1234
- · Replies 1 ·
Linear thermal expansion and work done
- dogman1234
- · Replies 3 ·
How do you convert temperature differences between Celsius and Kelvin?
- lizlyn
- · Replies 2 ·
Need Notes for Class 11 NCERT Book [Physics]
- christiano
- · Replies 3 ·
Faraday's law and perpetual motion
- Princess19
- · Replies 5 ·
Coaxial cable problem, electric field strength?
- roccofitz
- · Replies 6 ·
Baseball problem Impulse-Momentum
- Anarion
- · Replies 4 ·
How to find Uab and Ucd in this circuit
- dado
- · Replies 4 ·
Solve 3 Optic Problems in 2 Days
- djanisf
- · Replies 4 ·
Finding wave speed and refraction angle for 75 Hz source
- vividcolours
- · Replies 1 ·
Angular Velocity and Angular Frequency
- zhaos
- · Replies 1 ·
The sum of torques is not the sum of torques?
- flyingpig
- · Replies 8 ·
Magnitude of momentum of electrons
- sanalsprasad
- · Replies 1 ·