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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What is Bob's recoil speed on frictionless ice?
- sona1177
- · Replies 9 ·
Inductive time constant, value of resistance
- clockworks204
- · Replies 1 ·
Golf ball hit by club (conservation problem)
- XanziBar
- · Replies 4 ·
What Is the Minimum Frequency for a Mass in Vertical Circular Motion?
- ninetyfour
- · Replies 3 ·
Force*Time graph with respect to momentum
- Donnie_b
- · Replies 3 ·
What is the impulse of friction?
- Jason03
- · Replies 7 ·
When and where is the signal received according to different reference frames?
- azure kitsune
- · Replies 4 ·
Moment and forces for a person standing on tiptoe
- arkofnoah
- · Replies 49 ·
Magnetic Force on A Curved Current Carrying Wire
- astralboy15
- · Replies 2 ·
Kinetic energy transfer problem
- Port
- · Replies 4 ·
Calculating the de Broglie Wavelength
- Jenkz
- · Replies 7 ·
Electric field between two plates
- Robin Lee
- · Replies 2 ·
Calculating Heat of Fusion of Ice from Data
- The legend
- · Replies 2 ·
An object travelling away from earth
- Mu naught
- · Replies 2 ·
Electric field inside a charged cylinder
- yoni162
- · Replies 3 ·
English expression - not stacionary heat flux
- lesy1
- · Replies 1 ·
Why is the human ear sensitive to 3500Hz sounds?
- rizardon
- · Replies 3 ·
Calculating Torque of charges at an angle
- Pete_01
- · Replies 1 ·
Projectile Motion Homework: Finding Height and Maximum Height - Physics
- rissie
- · Replies 3 ·
How Does Potential Energy Change During a Free Fall Without Air Resistance?
- DrummingAtom
- · Replies 1 ·
How Does Pressure Affect Water Density in the Mariana Trench?
- mandy9008
- · Replies 3 ·
Electron and Uniformly Charged Disk
- thebert010
- · Replies 3 ·
Rotational Kinematics? Revolutions of a propeller?
- JHCreighton
- · Replies 7 ·
Deriving net force from mass, velocity, and time
- elasticities
- · Replies 1 ·
What Happens to Velocity and Momentum of a Water-Filled Bucket on Ice?
- ortegavs
- · Replies 2 ·
Finding time for rock thrown upward from 50m building
- elasticities
- · Replies 6 ·
Magnitude of the field used for electron
- flynostrich08
- · Replies 4 ·
Calculating Buoyancy in a Disaster Survivor Scenario
- mandy9008
- · Replies 12 ·
Distance travel given constant a
- angelcase
- · Replies 8 ·
Newton's Law of Cooling and ambient temperature
- Fancy Moses
- · Replies 1 ·
Circular Motion on a Clock Question
- ninetyfour
- · Replies 8 ·
Can Loose Objects in a Car Cause Serious Injury? A Newton's First Law Experiment
- Steph
- · Replies 3 ·
A typical 12v batter can deliver about 7.5 x 10^5 C
- atoreta88
- · Replies 3 ·
Integration of Planck's law to find photon density in space
- yankans
- · Replies 1 ·
What is the purpose of the fourth satellite in GPS navigation?
- denni0302
- · Replies 4 ·
A glass of water on an inclined plane
- Swap
- · Replies 21 ·
Solving Energy Dissipation in Lightbulbs Connected to a Power Line
- Mitchtwitchita
- · Replies 2 ·
Why doesn't Newton's third law make the net force zero?
- llamajuice
- · Replies 1 ·
Cart Acceleration and Tension in a Multi-Cart System
- llamajuice
- · Replies 28 ·
Tension in ropes with mass connecting two blocks
- sona1177
- · Replies 2 ·
Tension in chains supporting a suspended sign with vector addition
- diana7
- · Replies 5 ·
How high can Jill reach on the swing after Jack jumps off?
- Summer202
- · Replies 4 ·
Racecar travelling a banked curve
- ninetyfour
- · Replies 4 ·
Calculating Angular Speed After Spoke Shortening in Rotating System
- mandy9008
- · Replies 5 ·
Projectile motion, vector components
- shawli
- · Replies 2 ·
Calculating Relative Velocities in Rivers
- shawli
- · Replies 6 ·
Does the torque increase or decrease as the angle increase?
- mandy9008
- · Replies 3 ·
Woman walking on beam supported by two pivots when does it tip
- mandy9008
- · Replies 3 ·
What is the eigenfrequency of a disc with mass 20 kg and no sliding motion?
- dirk_mec1
- · Replies 11 ·
What is the Summation of Torques Equation for Figure P8.4?
- mandy9008
- · Replies 1 ·
Finding tension and reaction force for a boom
- mandy9008
- · Replies 1 ·
Finding center of gravity with a cut out
- mandy9008
- · Replies 2 ·
Acceleration of a car moving at constant velocity
- dyenz
- · Replies 4 ·
Calculating Forces in Equilibrium for Suspended Sign
- mandy9008
- · Replies 4 ·
Finding particle speed at x=2.5cm with piecewise acceleration
- thereddevils
- · Replies 6 ·
Finding Coefficient of Restitution for 2D Collision
- bobred
- · Replies 6 ·
Calculate Work Done by Field to Remove 5µC Charge from Equilateral Triangle
- flynostrich08
- · Replies 1 ·
Finding focal length for a slide projector with magnification
- Kalibasa
- · Replies 7 ·
Two objects on a vertical spring with different masses
- habman_6
- · Replies 10 ·
Friction force on 4kg block in pulley system with 2kg and 4kg hanging masses
- allsmiles
- · Replies 21 ·
Acceleration of a Pulley System?
- allsmiles
- · Replies 2 ·
Where is the electric field zero between a 6μC charge at origin and -10μC at 5cm?
- flynostrich08
- · Replies 1 ·
Magnitude and direction of charge
- flynostrich08
- · Replies 3 ·
Thin-film interference question
- aznshark4
- · Replies 5 ·
Solving for Time: Police Car Catches Speeder
- ashvinthecha
- · Replies 1 ·
Solve Thin-Film Equations: Red Light on Oil in Water
- r_swayze
- · Replies 2 ·
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
- · Replies 1 ·
Vector components - displacement
- shawli
- · Replies 4 ·
Calculating Sound Power from Intensity and Distance
- shards5
- · Replies 2 ·
Verifying Solidity/Hollowness of a Copper Object
- jpfelgueiras
- · Replies 1 ·
High School Physics: Doppler Effect
- Litterus
- · Replies 3 ·
How Is Frictional Force Calculated When Resultant Force Is Zero?
- tgpnlyt7095
- · Replies 2 ·
Find the ratio of the electrostatic force
- atoreta88
- · Replies 4 ·
How Do Rotation and Translation Affect a Pool Ball's Movement?
- Sobeita
- · Replies 2 ·
Force of a magnetic field on a current
- rudders93
- · Replies 2 ·
Calculating Kinetic Energy of Rotating Bar
- delve
- · Replies 2 ·
Transmission Lines and Electrical Fields
- MiniJo
- · Replies 6 ·
Gravity and Weight: How Do They Compare on Different Planets?
- blackrose01
- · Replies 4 ·
Physics 12: Acceleration and Distance Problem Solution
- Shakers
- · Replies 2 ·
Relationship between Newton's laws and distance
- sona1177
- · Replies 2 ·
Can Horizontal Force Lolcats Enhance Your Workout?
- jimg9000
- · Replies 1 ·
Calculating the diameter of a polonium atom
- Jenkz
- · Replies 2 ·
Springs, kinetic energy and work
- eprparadox
- · Replies 1 ·
Solving Two Lens System: O1, F1, F2, i2, M
- Neophyte
- · Replies 3 ·
Terminal speed of a 75 kg man falling feet first
- sona1177
- · Replies 5 ·
Calc Equilibrium Forces in Rigid Bodies
- hellknows2008
- · Replies 3 ·
Force on charged plate between two conductors
- Tusike
- · Replies 9 ·
Circuit with capacitors in series and parallel
- leslielau
- · Replies 5 ·
Can you add flux contributions?
- minifhncc
- · Replies 5 ·
What is the normal force on a child going down an inclined slide?
- sona1177
- · Replies 2 ·
How is the Universe Constantly Increasing in Entropy?
- ninjarawr
- · Replies 5 ·
Understanding ∫B.dl: What Does It Mean/Represent?
- minifhncc
- · Replies 2 ·
Energy Bound Orbit: Minimal Radius Calculation
- PhMichael
- · Replies 24 ·
Electric field and electron acceleration
- kong12
- · Replies 5 ·
What is the Apparent Weight of a Passenger in Free Fall?
- sona1177
- · Replies 2 ·
What is the Velocity of a Wave Pulse Described by y(x,t)=De^-(Bx-Ct)^2?
- rizardon
- · Replies 1 ·
How fast was he moving when he hit the parked car?
- Derekj032
- · Replies 4 ·