Introductory Physics Homework Help Forum

Post thread
Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
What is the angle between a vector and the positive x-axis?
  • mbecker19
  • · Replies 5 ·
Replies
5
Hollow cube - moment of inertia
  • blr
  • · Replies 15 ·
Replies
15
Drawing lemonade of density 1000 kg/m3 up a straw to a maximum height
  • Forceflow
  • · Replies 4 ·
Replies
4
Circuits: Solving Homework Statement on p, i, w
  • Zythyr
  • · Replies 9 ·
Replies
9
Midpoint of P and Q: Finding 1/3 Distance
  • sdoyle
  • · Replies 2 ·
Replies
2
Magnitude and direction of the current in conductor
  • bap902
  • · Replies 3 ·
Replies
3
How Many People Can a Raft Hold While Keeping Feet Dry?
  • chantalprince
  • · Replies 11 ·
Replies
11
Flight time of Projectile motion
  • wassup
  • · Replies 3 ·
Replies
3
Find the acceleration of a race car traveling up a curve
  • Rubber Band
  • · Replies 8 ·
Replies
8
How to Calculate Mechanical Advantage of Box On a Board
  • syang9
  • · Replies 2 ·
Replies
2
Basic special relativity question
  • theneedtoknow
  • · Replies 2 ·
Replies
2
Tension elevator on a scale problem
  • freepancakes
  • · Replies 2 ·
Replies
2
Calculating Tension for Beginners
  • WakeOfBeauty
  • · Replies 6 ·
Replies
6
Center of mass of a rod question.
  • hellomister
  • · Replies 6 ·
Replies
6
Drill problem, linear speed of drill bit help
  • marcuss
  • · Replies 1 ·
Replies
1
Thermal Conduction - Finding Temperature of Interface Between 2 Slabs
  • MadmanMurray
  • · Replies 1 ·
Replies
1
Use integration to find the total force on a point HELP
  • lmlgrey
  • · Replies 5 ·
Replies
5
Thermal Equilibrium: Solving for the Specific Heat of an Unknown Metal
  • ApexStudent1
  • · Replies 2 ·
Replies
2
Possible Difference in Light Paths for Coherent Sources at Point P?
  • jullrich
  • · Replies 5 ·
Replies
5
Help, AS level physics for a complete beginner
  • I'mstuck...x
  • · Replies 1 ·
Replies
1
Girl Throws Weights: Calculate Speed Relative to Ground
  • abbie
  • · Replies 1 ·
Replies
1
Electric Charge of Water droplet falling
  • hemetite
  • · Replies 2 ·
Replies
2
Solving a 1500 W Heater Short Circuit
  • Gogsey
  • · Replies 3 ·
Replies
3
Electric field and point charges
  • Inertialforce
  • · Replies 1 ·
Replies
1
How Much Force Does a Falling Boy Exert on a Net?
  • Xept
  • · Replies 1 ·
Replies
1
Film interference with light and refration
  • stickplot
  • · Replies 1 ·
Replies
1
What is the Solution to a Tension Problem using Trigonometry?
  • jonnyboy
  • · Replies 3 ·
Replies
3
Banking a Road: Calculating the Angle at 30ms^-1
  • Identity
  • · Replies 1 ·
Replies
1
Measuring Simple Pendulum Acceleration: Tips for Accuracy and Reliability
  • chopstick
  • · Replies 6 ·
Replies
6
Calculating Force on a Wire in a Magnetic Field
  • predentalgirl1
  • · Replies 2 ·
Replies
2
What Orientation Produces Maximum Torque in a Magnetic Field?
  • Inertialforce
  • · Replies 1 ·
Replies
1
"Calculating Work Needed to Change Orbits
  • Identity
  • · Replies 4 ·
Replies
4
HELP! Oscillation Problem Solution
  • Kudo Shinichi
  • · Replies 3 ·
Replies
3
Finding the y-component from Vectorys
  • Jordash
  • · Replies 7 ·
Replies
7
Torque and angular momentum of a swing
  • dimpledur
  • · Replies 3 ·
Replies
3
Calculate Force on Submarine Hatch due to Seawater Pressure
  • dimpledur
  • · Replies 5 ·
Replies
5
How Do Incline Angles Affect the Speed of a Rolling Ball?
  • nvez
  • · Replies 4 ·
Replies
4
Potential Elastic Energy & Kinetic Energy
  • nvez
  • · Replies 6 ·
Replies
6
Physics thermodynamics equation
  • proace360
  • · Replies 1 ·
Replies
1
What does fraction of G mean? (SI units)
  • Kalie
  • · Replies 5 ·
Replies
5
What Distance Must a Rock Fall to Double Its Speed?
  • swede5670
  • · Replies 1 ·
Replies
1
Fluid Physics Help: Find Water Distance at 10mm Diam.
  • ch2kb0x
  • · Replies 1 ·
Replies
1
Net Potential Energy between two Adjacent Ions
  • Saladsamurai
  • · Replies 4 ·
Replies
4
Need help with the sign of g in free fall acceleration
  • hachi_roku
  • · Replies 1 ·
Replies
1
The Attempt at a SolutionLaunching 1000kg Weather Rocket: 5100m in 20s
  • hachi_roku
  • · Replies 4 ·
Replies
4
New to the board. Can I get some guidance on a couple of questions?
  • lsumatt
  • · Replies 3 ·
Replies
3
Solving Bernoulli Problems Homework: Pressure Differential Question
  • mujadeo
  • · Replies 1 ·
Replies
1
Calulating voltage across a resistor
  • wormvortex
  • · Replies 6 ·
Replies
6
How Do You Calculate the Charges on Two Spheres in Electrostatic Equilibrium?
  • krnaudio
  • · Replies 1 ·
Replies
1
Light & Refraction: Wavelengths & Frequency Ratios
  • stickplot
  • · Replies 2 ·
Replies
2
How Do You Calculate the Time and Height of a Ball Thrown Upwards?
  • calisoca
  • · Replies 4 ·
Replies
4
What is the Angle of Deflection in a Colliding Ball and BB Gun Problem?
  • mixedmetaphor
  • · Replies 2 ·
Replies
2
What is the angle at which the archer fired the arrow?
  • matty796
  • · Replies 4 ·
Replies
4
Physics 20-1 Final Review: Projectiles
  • physicznoob
  • · Replies 6 ·
Replies
6
Calculating Overtaking Time and Distance in One-Dimensional Motion
  • Ayesh
  • · Replies 4 ·
Replies
4
Velocity Time graphs and Displacements
  • amd123
  • · Replies 3 ·
Replies
3
How Large is the Spherical Cavity Inside the Concrete Chunk?
  • wallace13
  • · Replies 1 ·
Replies
1
Calculating Gauge Pressure in a Two-Story House
  • wallace13
  • · Replies 2 ·
Replies
2
Wierd question involving time and acceleration
  • amd123
  • · Replies 3 ·
Replies
3
Buoyancy (Weight of a barbell underwater)
  • wallace13
  • · Replies 2 ·
Replies
2
Beginnger Coefficient of Kinetic Friction Problem
  • amd123
  • · Replies 2 ·
Replies
2
Magnetism and force on a conductor
  • Inertialforce
  • · Replies 2 ·
Replies
2
Momentum and Collisions in 2 dimensions
  • cheese825
  • · Replies 1 ·
Replies
1
Why Do These Basic High School Physics Problems Confuse Me?
  • MR_COW
  • · Replies 6 ·
Replies
6
Circular Motion: Radial Distance vs. Period of Rotation
  • Thereheis
  • · Replies 2 ·
Replies
2
Is It True That Ideal Fluids Always Flow from High Pressure to Low Pressure?
  • syang9
  • · Replies 1 ·
Replies
1
How Do You Calculate Uncertainty in Volume and Trigonometric Functions?
  • ncm2
  • · Replies 5 ·
Replies
5
Complex Physics Problem Need Help Please
  • Phillipc
  • · Replies 2 ·
Replies
2
Cup on a table, heat or work process?
  • Kites
  • · Replies 1 ·
Replies
1
What is the maximum height for siphon water drainage?
  • syang9
  • · Replies 5 ·
Replies
5
How Do You Solve Basic Kinematics Problems?
  • amd123
  • · Replies 5 ·
Replies
5
How to calculate sound intensity when given decibels
  • DMOC
  • · Replies 3 ·
Replies
3
Conservation of Momentum Problem- Bullet
  • Littlemin5
  • · Replies 5 ·
Replies
5
Elastic collision shuffleboard problem
  • KD-jay
  • · Replies 2 ·
Replies
2
Solving the Last Practice Problem: A Coast Guard Challenge
  • anuman
  • · Replies 3 ·
Replies
3
Maximum acceleration before tipping occurs
  • oldmancan
  • · Replies 8 ·
Replies
8
Physics Particle Movement Calculations
  • Jordash
  • · Replies 4 ·
Replies
4
Conservation of Momentum problem
  • toasted
  • · Replies 2 ·
Replies
2
I solving three problems (2 for friction, 1 in hooke's law)
  • accol
  • · Replies 2 ·
Replies
2
Weak Force Affects Particles: Electrons & Quarks
  • temaire
  • · Replies 3 ·
Replies
3
Question about sound intensity (this should be simple I think)
  • phys62
  • · Replies 1 ·
Replies
1
Magnetism - Quick solenoid question
  • thehammer
  • · Replies 3 ·
Replies
3
What is the intensity formula for a spherical sound wave?
  • Pastel
  • · Replies 2 ·
Replies
2
Calculate Flux Density of Current Loop
  • LandonV
  • · Replies 9 ·
Replies
9
The Vector nature of Newton's Second Law
  • Mathcaptor
  • · Replies 19 ·
Replies
19
Introductry Physics- Coloumbs Law problem
  • moephysics
  • · Replies 2 ·
Replies
2
What is a differential equation?
  • KAV
  • · Replies 2 ·
Replies
2
Analyzing Collisions and Energy Transfer in AP Mechanics Problems
  • nns91
  • · Replies 7 ·
Replies
7
What Direction Does Surface Tension Pull on a Circular Plate?
  • ritwik06
  • · Replies 6 ·
Replies
6
Symmetry Arguments-a finite cylindrical can
  • jromega3
  • · Replies 1 ·
Replies
1
Coefficient Of Friction (Circular Motion)
  • Air
  • · Replies 5 ·
Replies
5
What Happens to Block Velocities and Spring Compression in a Collision?
  • abbie
  • · Replies 1 ·
Replies
1
Forced Oscillations of Mass-Spring System: Reasons for Observed Behaviour
  • nokia8650
  • · Replies 1 ·
Replies
1
How Do You Calculate Tension in a Transverse Wave on a String?
  • phys62
  • · Replies 1 ·
Replies
1
How Can I Calculate X Ideal for a Water Balloon Launcher?
  • manslayer68
  • · Replies 2 ·
Replies
2
Classical Mechanics: Solving for x(t) from V(x) = const.
  • auslmar
  • · Replies 3 ·
Replies
3
Bouyant force and apparent weight
  • chantalprince
  • · Replies 2 ·
Replies
2
How Does Resistance Affect Current in Parallel Circuits?
  • stickplot
  • · Replies 2 ·
Replies
2
What is a differential equation?
  • KAV
  • · Replies 3 ·
Replies
3
How Do Astronauts Calculate the Acceleration of an Asteroid in Space?
  • Jumpman24
  • · Replies 3 ·
Replies
3