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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Can an arrow shot from a 100m cliff reach a mark 430m away?
- dboy83
- · Replies 10 ·
Quantum Theory - The Photo-Electric Effect
- lando45
- · Replies 3 ·
How Do You Solve the Block on Wedge Problem with a Moving Wedge?
- konichiwa2x
- · Replies 1 ·
Valid Units of Measure for Trig Argument
- Ronnin
- · Replies 5 ·
Atwood machine with block removed after 2 seconds
- konichiwa2x
- · Replies 2 ·
What is quantum entanglement and how does it relate to teleportation?
- semc
- · Replies 1 ·
How Do You Calculate Acceleration and Tension in a Two-Crate Pulley System?
- SailorMoon14
- · Replies 1 ·
Does Gravitational Potential Energy Apply to Dual Massive Particles?
- chuy
- · Replies 1 ·
Electric current and direct current circuits
- Trifecta
- · Replies 14 ·
Pilot Must Maintain Velocity of 353.11km/h for London-Rome Flight
- richievuong
- · Replies 1 ·
Dropping an object from a moving plane.
- opticaltempest
- · Replies 5 ·
How Much Force Exerts on a Bullet in a Rifle Barrel?
- SailorMoon14
- · Replies 1 ·
What is the force required for centripetal motion in a horizontal circle?
- mrkt321
- · Replies 3 ·
Can Any Function Be Decomposed into Odd and Even Subfunctions?
- thenewbosco
- · Replies 1 ·
Solve Mass of Dog Food Given Force, Acceleration, Time
- Pencil
- · Replies 3 ·
Very interesting estimation problem
- rocketboy
- · Replies 2 ·
Find Total Capacitance of Cube w/12 4.71pF Capacitors
- eltel2910
- · Replies 1 ·
Projectile Motion, A study of height and time
- mmiller39
- · Replies 1 ·
What force does the trailer exert on the car?
- Pencil
- · Replies 2 ·
2D kinematics problems: projectiles, relative velocity, and escalators
- mmiller39
- · Replies 9 ·
Electron accelerated through field
- QuantumKing
- · Replies 3 ·
Explaining Ohm's law to a 12-year-old
- cupsmom
- · Replies 3 ·
Solving Plane Displacement Using Radar Data
- Double D Edd
- · Replies 1 ·
Graphical analysis, vx, ax, and xf problems
- mark9159
- · Replies 1 ·
Rocket fired upward at 5 m/s², engine fails and falls for 12 seconds
- blumatrix
- · Replies 7 ·
Quantum Theory makes me go crazy
- President Mercury
- · Replies 10 ·
Find equilibruium position for charged partical problem
- FocusedWolf
- · Replies 5 ·
Solving Hess's Law Problem for ΔH of Formation of Hematite
- ice87
- · Replies 3 ·
How Does Ohm's Law Apply to Measuring Current and Voltage in Circuit Problems?
- mikejones2000
- · Replies 1 ·
Bob's three-leg walk and ducks flying into a crosswind
- NIZBIT
- · Replies 3 ·
Help me understand x and y components, sin cos, etc.
- mikefitz
- · Replies 14 ·
Ball thrown upward and elapsed time
- dboy83
- · Replies 26 ·
Vector Equation: Finding the Solution for -E-2F
- NIZBIT
- · Replies 2 ·
Why Does Time Dilation Not Apply When Rocket A's and Earth's Tails Meet?
- eok20
- · Replies 1 ·
Why does sin⁻¹(current/boat speed) give the angle to cross perpendicular?
- mikefitz
- · Replies 3 ·
The Upside Down World - Is It Real?
- .:superfry:.
- · Replies 1 ·
Calculating Normal Force on a Box
- PascalPanther
- · Replies 7 ·
What is the Coefficient of Kinetic Friction and Acceleration in a Pulley System?
- Soaring Crane
- · Replies 3 ·
Graphical Techniques for Vector Displacement and Magnitude Calculations
- wtf_albino
- · Replies 6 ·
Using the second law to prove heat absorbed must be positive if work is zero
- hristogrigorov
- · Replies 2 ·
Kinematics: Ball Thrown Upward from Building
- dboy83
- · Replies 3 ·
How do I linearize a hyperbolic inverse relationship graph?
- mushroom
- · Replies 3 ·
Jungle Veterinarian Shoots Monkey: Solving for Minimum Dart Velocity
- superdave
- · Replies 4 ·
Why Does a Block Lose Contact with a Frictionless Sphere?
- MathematicalPhysicist
- · Replies 9 ·
Are field lines from a centered charge uniformly distributed on a cube face?
- physicsforlife
- · Replies 6 ·
Calculating Acceleration and Distance in Kinematic Equations
- toddler
- · Replies 9 ·
How Does the Compton Effect Explain Photon-Electron Collisions?
- Extherium
- · Replies 1 ·
Two Superposed Vibrations of Equal Frequency
- EP
- · Replies 1 ·
Confusion on Potential Changes in Electric Fields
- NotMrX
- · Replies 2 ·
How Does Projectile Angle Affect Range and Height?
- dboy83
- · Replies 4 ·
Equation of motion for baseball with wind drag in x and y directions
- SugarHoneyIceTea
- · Replies 1 ·
What was the i-component of the wind velocity vector?
- luckii
- · Replies 2 ·
Problems involving frames of reference and relative velocity
- Byrgg
- · Replies 3 ·
Finding acceleration and tension for 420N and 190N blocks connected by pulley
- rwofford
- · Replies 3 ·
Which resistor gets most power in both series and parallel?
- luice
- · Replies 3 ·
Passing sight distance for a 50 mph vehicle on a two-lane highway
- Probie
- · Replies 9 ·
How Do You Measure a Bullet's Speed?
- base
- · Replies 1 ·
Water drops falling at equal time intervals from shower nozzle
- Bkr5006
- · Replies 7 ·
Free Fall Q: Find Where Balls Cross Paths
- tigerguy
- · Replies 5 ·
How Can Vector C Be Expressed in Terms of A, B, and u?
- thenewbosco
- · Replies 1 ·
Electric fields/angle of deflection problem
- oksanav
- · Replies 1 ·
Electric field absolute error with potential difference and distance
- soconfused
- · Replies 1 ·
How do I find the damping constant of a pendulum?
- NINHARDCOREFAN
- · Replies 5 ·
Choosing a Physics Topic for Oral Presentation
- danago
- · Replies 10 ·
Find Minimum Potential of Two Charges on x-Axis
- eltel2910
- · Replies 1 ·
Force around a horizontal circle
- bearhug
- · Replies 4 ·
How Is Angular Velocity Affected by Mass Distribution in a Rotating System?
- John O' Meara
- · Replies 3 ·
Enthalpy: Why Does Temperatures Affect it?
- arjentje
- · Replies 3 ·
Is Time Travel Really Possible?
- danago
- · Replies 2 ·
Kinematics (conceptual questions)
- vu10758
- · Replies 1 ·
Does propping a cannon against a tree change the range?
- oblivinated
- · Replies 2 ·
How to Calculate Frictional Force on an Inclined Plane?
- ku1005
- · Replies 2 ·
Differance Between Analogue and Digital TV
- James Roberts
- · Replies 3 ·
What is the direction and magnitude of the third leg of the sailor's journey?
- Soaring Crane
- · Replies 3 ·
Incline, Friction, and Work: Calculating the Speed of a Snowboarder on a Hill
- Super King
- · Replies 5 ·
Vector Components and Finding the Angle
- Soaring Crane
- · Replies 3 ·
Physics of nitrous oxide systems in cars
- pavadrin
- · Replies 2 ·
Javelin velocity angle decay and maximum jump height
- boratphilo
- · Replies 2 ·
Calculating Boat Speed in 2-D Relative Motion
- BunDa4Th
- · Replies 51 ·
Calculating Liquid Mass in a Vat with Varying Diameter and Depth
- jkb
- · Replies 7 ·
Diver springs from 3 m board at 8.90 m/s and 73° angle
- carrbaseball
- · Replies 20 ·
How Do You Solve Adiabatic Process Problems Involving a Piston and Sand?
- sheyshaw
- · Replies 7 ·
Colliding particles, level 3 difficulty
- mbrmbrg
- · Replies 8 ·
Electric field in a sphere with a hole
- Sculptured
- · Replies 1 ·
Two slides have different angles, find the numeric angle
- mikefitz
- · Replies 1 ·
Solving Two Cars Intersection Problem: Velocity of Car B Relative to Car A
- Chutzpah
- · Replies 1 ·
Mass-Spring Oscillation question
- Mozart
- · Replies 2 ·
Automobile Centripetal acceleration
- bearhug
- · Replies 1 ·
How Do You Calculate the Radius of Curvature for a Mirror?
- Huskies213
- · Replies 3 ·
I bet you cant figure this one out
- schwic
- · Replies 2 ·
Typing physics equations in MS Word efficiently
- Iceman2032
- · Replies 5 ·
Dropped camera from helicopter and motorcycle overtaking car problems
- Shadowstepper
- · Replies 2 ·
Projectile motion problems with horizontal launches
- wakejosh
- · Replies 7 ·
What is the flux though each of the surfaces
- indigojoker
- · Replies 2 ·
How Do You Calculate Forces and Friction in Physics Problems?
- uhhjenn
- · Replies 19 ·
Why does a car have 4 times the kinetic energy at 100 km/hr?
- Skittles
- · Replies 1 ·
How Do You Find Acceleration Using Unit Vectors?
- Bob_Dobbs
- · Replies 4 ·
Car jump over washed bridge and projectile motion problems
- wakejosh
- · Replies 16 ·
How to Calculate Projectile Angle for Landing in a Specific Distance - 120m
- bengaltiger14
- · Replies 29 ·
Answer Torque Req'd to Reach 300 rev/min in 10s - K.E. at 300rev/min
- John O' Meara
- · Replies 1 ·