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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I with vector addition and subtraction
- ninetyfour
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How Much Energy Is Stored in a Non-Stretching Rope and Mass System?
- Higgy
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Solving Distance of Train from Start to Stoppage
- Canha
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Sailing East: Finding Ship's Ground Velocity
- ashvinthecha
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Estimating image distance in lens and mirror
- ShineyPenny
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Forces - finding minimum mass given coefficients of friction
- shawli
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Electric Field and Potential in Spherical Shells
- rizardon
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Forces - two objects in contact
- shawli
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Sketching Vector Function: -yx'+xy
- abrowaqas
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Why does mass cancel out in centripetal acceleration v²/r?
- fcb
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Magnitude and direction of the electrostatic
- jasonlewiz
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Spring on 39° incline propelling 4.9 kg mass
- kris8969
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What is Bob's recoil speed on frictionless ice?
- sona1177
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Inductive time constant, value of resistance
- clockworks204
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Golf ball hit by club (conservation problem)
- XanziBar
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What Is the Minimum Frequency for a Mass in Vertical Circular Motion?
- ninetyfour
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Force*Time graph with respect to momentum
- Donnie_b
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What is the impulse of friction?
- Jason03
- · Replies 7 ·
When and where is the signal received according to different reference frames?
- azure kitsune
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Moment and forces for a person standing on tiptoe
- arkofnoah
- · Replies 49 ·
Magnetic Force on A Curved Current Carrying Wire
- astralboy15
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Kinetic energy transfer problem
- Port
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Calculating the de Broglie Wavelength
- Jenkz
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Electric field between two plates
- Robin Lee
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Calculating Heat of Fusion of Ice from Data
- The legend
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An object travelling away from earth
- Mu naught
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Electric field inside a charged cylinder
- yoni162
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English expression - not stacionary heat flux
- lesy1
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Why is the human ear sensitive to 3500Hz sounds?
- rizardon
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Calculating Torque of charges at an angle
- Pete_01
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Projectile Motion Homework: Finding Height and Maximum Height - Physics
- rissie
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How Does Potential Energy Change During a Free Fall Without Air Resistance?
- DrummingAtom
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How Does Pressure Affect Water Density in the Mariana Trench?
- mandy9008
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Electron and Uniformly Charged Disk
- thebert010
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Rotational Kinematics? Revolutions of a propeller?
- JHCreighton
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Deriving net force from mass, velocity, and time
- elasticities
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What Happens to Velocity and Momentum of a Water-Filled Bucket on Ice?
- ortegavs
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Finding time for rock thrown upward from 50m building
- elasticities
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Magnitude of the field used for electron
- flynostrich08
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Calculating Buoyancy in a Disaster Survivor Scenario
- mandy9008
- · Replies 12 ·
Distance travel given constant a
- angelcase
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Newton's Law of Cooling and ambient temperature
- Fancy Moses
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Circular Motion on a Clock Question
- ninetyfour
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Can Loose Objects in a Car Cause Serious Injury? A Newton's First Law Experiment
- Steph
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A typical 12v batter can deliver about 7.5 x 10^5 C
- atoreta88
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Integration of Planck's law to find photon density in space
- yankans
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What is the purpose of the fourth satellite in GPS navigation?
- denni0302
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A glass of water on an inclined plane
- Swap
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Solving Energy Dissipation in Lightbulbs Connected to a Power Line
- Mitchtwitchita
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Why doesn't Newton's third law make the net force zero?
- llamajuice
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Cart Acceleration and Tension in a Multi-Cart System
- llamajuice
- · Replies 28 ·
Tension in ropes with mass connecting two blocks
- sona1177
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Tension in chains supporting a suspended sign with vector addition
- diana7
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How high can Jill reach on the swing after Jack jumps off?
- Summer202
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Racecar travelling a banked curve
- ninetyfour
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Calculating Angular Speed After Spoke Shortening in Rotating System
- mandy9008
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Projectile motion, vector components
- shawli
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Calculating Relative Velocities in Rivers
- shawli
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Does the torque increase or decrease as the angle increase?
- mandy9008
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Woman walking on beam supported by two pivots when does it tip
- mandy9008
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What is the eigenfrequency of a disc with mass 20 kg and no sliding motion?
- dirk_mec1
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What is the Summation of Torques Equation for Figure P8.4?
- mandy9008
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Finding tension and reaction force for a boom
- mandy9008
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Finding center of gravity with a cut out
- mandy9008
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Acceleration of a car moving at constant velocity
- dyenz
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Calculating Forces in Equilibrium for Suspended Sign
- mandy9008
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Finding particle speed at x=2.5cm with piecewise acceleration
- thereddevils
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Finding Coefficient of Restitution for 2D Collision
- bobred
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Calculate Work Done by Field to Remove 5µC Charge from Equilateral Triangle
- flynostrich08
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Finding focal length for a slide projector with magnification
- Kalibasa
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Two objects on a vertical spring with different masses
- habman_6
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Friction force on 4kg block in pulley system with 2kg and 4kg hanging masses
- allsmiles
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Acceleration of a Pulley System?
- allsmiles
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Where is the electric field zero between a 6μC charge at origin and -10μC at 5cm?
- flynostrich08
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Magnitude and direction of charge
- flynostrich08
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Thin-film interference question
- aznshark4
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Solving for Time: Police Car Catches Speeder
- ashvinthecha
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Solve Thin-Film Equations: Red Light on Oil in Water
- r_swayze
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Car pushing truck with 4500 N force
- sona1177
- · Replies 4 ·
Electric field at a point on the perpendicular bisector of a finite line charge
- debeloglava
- · Replies 5 ·
The Physics Behind Gaussian Guns
- gaz3992
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Vector components - displacement
- shawli
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Calculating Sound Power from Intensity and Distance
- shards5
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Verifying Solidity/Hollowness of a Copper Object
- jpfelgueiras
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High School Physics: Doppler Effect
- Litterus
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How Is Frictional Force Calculated When Resultant Force Is Zero?
- tgpnlyt7095
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Find the ratio of the electrostatic force
- atoreta88
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How Do Rotation and Translation Affect a Pool Ball's Movement?
- Sobeita
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Force of a magnetic field on a current
- rudders93
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Calculating Kinetic Energy of Rotating Bar
- delve
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Transmission Lines and Electrical Fields
- MiniJo
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Gravity and Weight: How Do They Compare on Different Planets?
- blackrose01
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Physics 12: Acceleration and Distance Problem Solution
- Shakers
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Relationship between Newton's laws and distance
- sona1177
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Can Horizontal Force Lolcats Enhance Your Workout?
- jimg9000
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Calculating the diameter of a polonium atom
- Jenkz
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Springs, kinetic energy and work
- eprparadox
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Solving Two Lens System: O1, F1, F2, i2, M
- Neophyte
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Terminal speed of a 75 kg man falling feet first
- sona1177
- · Replies 5 ·