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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Climber hanging from a cliff and acceleration
- cardhouse42
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What Is the Probability of Two Random Walkers Meeting Again After N Steps?
- bigplanet401
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Solve for Smallest Theta for Slider to Reach A
- stinlin
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Force on a current-carrying rod
- Dart82
- · Replies 9 ·
Finding angle of net electric force using arctan(Fy/Fx)
- BunDa4Th
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How Is Momentum Conserved in an Inelastic Collision When Both Vehicles Stop?
- pivoxa15
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Coefficient of Kinetic Friction on an Incline
- graywolf27
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Unit for Gravitational Attraction Between Objects?
- Thrawn
- · Replies 4 ·
Coulomb force magnitude calculations with three charges
- BunDa4Th
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Kirchhoff's rules with three batteries in series
- rgo
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Distance between two electrons where electric force balances gravity
- BunDa4Th
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Frictional force on a 15-N cart in a jet cruising at constant velocity
- Peterson
- · Replies 25 ·
Calculating Energy Needed to Fill a 100ft Round Tank with Gasoline
- mellbee
- · Replies 5 ·
Solving Vector Measurement Concerns in Lab
- Agent
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Solve for θ to get the angle of the hill.
- ludakrishna
- · Replies 6 ·
Calculating Impulse and Momentum for a Dump Truck
- ludakrishna
- · Replies 4 ·
Calculating Detection Distance of Superconducting Gravity Meter
- Gammage
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Compute the tangential acceleration
- cycam
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Tension in a chin strap producing 5 N upward force
- Elkay
- · Replies 5 ·
Question regarding average velocity
- missequivocal
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Why do space shuttles need escape velocity for short trips to Mars or the moon?
- blackcat
- · Replies 5 ·
What am I doing wrong in calculating the capacitance of an air-filled capacitor?
- AdKo
- · Replies 10 ·
Potential Difference of Capacitors
- AdKo
- · Replies 2 ·
Projectile Motion of a Jet Fighter: Calculating Velocity, Energy, and Power
- JamalJenkins
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Spring constant and maximum acceleration
- cgward
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Net electrostatic forces on three collinear charged balls
- pugfug90
- · Replies 5 ·
Frictional Force 2: Find Coefficient of Kinetic Friction on Ice
- Peterson
- · Replies 31 ·
Block going up frictionless incline
- cycam
- · Replies 19 ·
Weightlessness while in the air
- Annubes
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Grav. Force - Mass of an object
- ecthelion4
- · Replies 5 ·
Calculating Frictional Work for Slowing Down a Car
- ecthelion4
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How Fast and at What Angle Must a Daredevil Jump to Cross a Canyon?
- Dan66Stang
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Work done by force F = bx³ from x = 0 to x = 2.2 m
- ecthelion4
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Find Height at 0.5v Velocity for Projectile
- Peach
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Newton's Second Law and car acceleration
- Annubes
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What is the speed of the ball 10.0 sec later?
- Peterson
- · Replies 15 ·
Questions about the ideal gas law - thermodynamics
- dealz
- · Replies 1 ·
Keys dropped from a Ferris wheel at 45° and three-quarters height
- Coastal
- · Replies 9 ·
Eclipsing binary system with 1 year period: magnitude and separation
- Soylentgreen
- · Replies 1 ·
Collision in 2 dimensions (Momentum)
- MattsVai
- · Replies 4 ·
How Far Will a Car Travel Up a Hill After Running Out of Gas?
- geejodi
- · Replies 16 ·
Apparently simple canoe problem - or not?
- pivoxa15
- · Replies 10 ·
Constructive/Destructive Interference Problem.
- asd1249jf
- · Replies 10 ·
Coulomb potential barrier calculation and fm units
- chemart
- · Replies 1 ·
Two charged spheres suspended from a point repel 24cm apart
- pugfug90
- · Replies 5 ·
Is the E Field Direction Downward for a Ring with Continuous Polarization?
- O.J.
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Calculating Internal Energy Loss from Friction in Satellite Fall
- brunie
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Pulley Question - Are the axes wrong?
- cipotilla
- · Replies 6 ·
What is the speed of sound at this temperature?
- rachelle
- · Replies 1 ·
Solving Final Image Formed from Convex and Concave Lens
- Brewer
- · Replies 9 ·
How Do You Calculate Distance Traveled Using a Speed/Time Graph?
- Trail_Builder
- · Replies 5 ·
Calculate Perigee Apogee Ratio for Satellite in Earth's Orbit
- brunie
- · Replies 12 ·
Finding Minimum Separation of Object and Image in a Converging Lens
- Brewer
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What Is the Plane's Acceleration Based on Pendulum Shift?
- skiracer88_00
- · Replies 1 ·
Potential difference between points in a parallel plate capacitor
- Kaoi
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Average velocity vector question. Try again
- Saladsamurai
- · Replies 8 ·
Why are all equipotential line voltages positive in dipole lab?
- cy19861126
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Ferry crossing a river at angle to current
- pivoxa15
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Change in Pendulum's Period with temperature.
- rmorelan
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Temperature Dependence on Pressure Change in Gases
- MMD
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How Do You Calculate Particle Kinetics and Potential Energy Changes?
- brunie
- · Replies 27 ·
Two masses connected via pulley: find acceleration
- pivoxa15
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What is the electric field strength at the center of the triangle?
- Mozart
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Force between two blocks pushed by 12N
- Weave
- · Replies 13 ·
Projectile on a 15° slope with 60° launch angle
- martine80
- · Replies 9 ·
The net force on a moving positive charge
- Dart82
- · Replies 7 ·
Magnetic Field with Time Dependence
- deenuh20
- · Replies 8 ·
Wheel Rotation: Vertical or Horizontal?
- majstro
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Identifying Stress in Three Rods: A Practical Approach
- stinlin
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How to Make a Capacitator Using Aluminum Foil and Wax Paper?
- aquabum619
- · Replies 9 ·
How Fast Should a Rock Be Thrown to Hit a Runner at 93 Yards?
- Aggie
- · Replies 9 ·
How can we effectively solve problems involving concave parabolic mirrors?
- SkyFlyer
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How High to Aim Above a Target to Correct for Gravity?
- Aggie
- · Replies 6 ·
What type of spectrum does a heated rock emit?
- aerogurl2
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How I can get the Velocity from knowing the distance
- enigmaticprefac
- · Replies 9 ·
How Many Trips Does a Bird Make Between Two Trains Before Getting Sandwiched?
- Rainbow
- · Replies 3 ·
Heat removed from a gas in a cylinder
- Jared944
- · Replies 1 ·
What Initial Velocity Ensures a Glass Slides Off a Table with Coulomb Friction?
- kristiakemi
- · Replies 6 ·
Circular Motion Problem: Downy Ball in Rotating Washing Machine
- irvine752
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Ship displacement with lighthouse bearing N27E
- pivoxa15
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Does Redshift Indicate Mutual Movement Between Distant Galaxies?
- aerogurl2
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What are the tensions in the strings for a rotating object?
- tnhoots
- · Replies 8 ·
Infinite resistance of a Voltmeter
- shehri
- · Replies 5 ·
Need Answer Check - Potential Energy
- ch3570r
- · Replies 11 ·
Adiabatic vs. Isothermal Expansion: How to Calculate Work and Temperature?
- bio87
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What Angle Does the Electron's Velocity Make with the Magnetic Field?
- Dart82
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Who first measured sound waves and how do tuning forks measure them?
- elitespart
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Max. magnetic force on an electron
- Dart82
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Finding support reactions for a truss with method of joints
- suspenc3
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Force in a Spanish Burton Rig pulley system
- suspenc3
- · Replies 2 ·
Problems that I got wrong and still don't understand
- jst
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Y's Work on a Test Charge: Calculating Work Done in an Electric Field
- rgo
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Solving Circuit with 3 Lightbulbs: Find Power & Voltage
- BunDa4Th
- · Replies 9 ·
Calculating Power of an Electromagnetic Wave from a Single Photon Source
- Prasanna Suman
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Centripetal And Centrifugal Forces
- danago
- · Replies 6 ·
What Causes the Net Force on a Displaced Ship in SHM?
- crossfacer
- · Replies 2 ·
Gravity of Sun at the Earth's Orbit
- Weave
- · Replies 2 ·
Algebra Question: vector equations
- Accurim
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How Do Sustained Consonants Like Shhhh Appear on an Oscilloscope?
- stylez03
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What units are used when measuring Log(I) in Amperes?
- cristian1500
- · Replies 2 ·