Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Threads
How Do You Calculate the Stopping Distance of a Car?
- bigtymer8700
- · Replies 11 ·
Conservation of energy (true or false)
- jumptheair
- · Replies 3 ·
Egg Drop Lab Challenge: Achieving Controlled Crushability in 8cm
- emma3001
- · Replies 4 ·
Ballistic Pendulum displacement
- kevina
- · Replies 11 ·
Finding the Resultant Force of Three Vectors
- free2rhyme12345
- · Replies 2 ·
Calculating Height from Work and Rotational Motion of a Rigid Body
- GoldShadow
- · Replies 2 ·
Stupid Buoyancy, this is getting ridiculous.
- Saladsamurai
- · Replies 8 ·
How Are Standing Sound Waves Solved?
- Kites
- · Replies 1 ·
Finding fan force from acceleration vs 1/mass graph
- Roze
- · Replies 5 ·
Photoelectric Effect and ozone layer
- fireandwater
- · Replies 2 ·
Gauss' Law With an Infinite Cylinder of Charge
- Poop-Loops
- · Replies 2 ·
How Do You Solve Vector Addition Problems?
- Bensky
- · Replies 3 ·
Rank Bulb Brightness A-F: Physics Solution
- skli
- · Replies 2 ·
Momentum question-just checking my method
- pinkyjoshi65
- · Replies 15 ·
What is the magnitude of the impulse in a ball-wall collision?
- chaotixmonjuish
- · Replies 8 ·
Work done on package by gravity: 784JNet work done on package: -37.7J
- bigtymer8700
- · Replies 5 ·
Nonuniform circular motion merry-go-round
- AvrGang
- · Replies 2 ·
How Do I Solve This Vector Displacement Problem?
- Bensky
- · Replies 5 ·
How Do You Calculate the Power Exerted by an Elevator Cable?
- KMjuniormint5
- · Replies 5 ·
What Length of Bungee Cord Should the Daredevil Use?
- twotaileddemon
- · Replies 8 ·
Thin Film Question: Finding Oil Slick Thickness
- bk999
- · Replies 2 ·
Why is y = (2m) cos (kx) dimensionally correct?
- mooneh
- · Replies 1 ·
Calculating Gas Temperature Change Using the Ideal Gas Law
- turnip
- · Replies 3 ·
How Do You Solve Rectilinear Motion Problems with Missing Data?
- Sebc
- · Replies 2 ·
How Is Work Calculated When Stretching a Spring?
- jumptheair
- · Replies 1 ·
Approximation to simple harmonic motion.
- Angelos
- · Replies 2 ·
How Do You Calculate Proton's Speed and Kinetic Energy in a Magnetic Field?
- t_n_p
- · Replies 2 ·
Rotational velocity of a system that has a mass launched at it stick to it
- ttk3
- · Replies 1 ·
Skateboarder speed needed to reach top of quarter pipe
- tibessiba
- · Replies 4 ·
Voltage Drop Across Transmission Lines
- jiten827
- · Replies 2 ·
How Does Cutting One String Affect the Acceleration of a Rod?
- delecticious
- · Replies 1 ·
Two charged spheres colliding and parallel-plate capacitor spacing
- tripz1196
- · Replies 1 ·
Physics Boat Problem involving velocity
- sympathy2
- · Replies 1 ·
Air Resistance free fall problem
- conradmiguel
- · Replies 6 ·
How Do You Solve Physics Problems Involving a Pulley System with Two Students?
- driedupfish
- · Replies 4 ·
Static equilibrium with a suspended sphere on a wall
- gills
- · Replies 5 ·
Angular Frequency for Small Oscillations
- lgmavs41
- · Replies 2 ·
Sound waves move from air to water
- starking
- · Replies 1 ·
Vector Problem: Get Home from 15.0 km Away
- janhen200
- · Replies 6 ·
Weight of block and static friction
- rcmango
- · Replies 1 ·
Moment of Inertia Problem: cylinder pivoting ona bearing
- delecticious
- · Replies 2 ·
How much will he weigh on a different planet
- rcmango
- · Replies 1 ·
Skier velocity and friction problem
- rcmango
- · Replies 3 ·
How Does Magnetic Repulsion Affect Puck Velocities in Elastic Collisions?
- pinkyjoshi65
- · Replies 15 ·
How is the particle's speed at points B and C determined?
- pcandrepair
- · Replies 12 ·
How to Determine if a Collision is in 2 Dimensions?
- pinkyjoshi65
- · Replies 13 ·
How can a 1kg block accelerate a 2kg block with a pulley system?
- Grapz
- · Replies 2 ·
Calculating the Speed of a Cylinder on a Frictional Ramp
- delecticious
- · Replies 6 ·
What is the Apparent Weight of a Pilot at the Bottom of a Loop?
- physstudent1
- · Replies 4 ·
Elevator starts from rest with constant acceleration
- splac6996
- · Replies 5 ·
Work and Kinetic Energy of cord
- saber1357
- · Replies 3 ·
Two methods for spring constant with 4 springs yield different answers
- GeoMike
- · Replies 3 ·
Maximum Static Friction Force for Spinning Disk and Block System
- splac6996
- · Replies 4 ·
Force that the wall exerts on the wedge
- klm
- · Replies 14 ·
Solving Tension Force in Plank Supported by Cables
- eraemia
- · Replies 1 ·
Capacitance and Voltage Confusion
- jendead
- · Replies 11 ·
How Does Wavelength Affect Photoelectron Production and Stopping Potential?
- Reshma
- · Replies 2 ·
Flywheel Kinetic Energy in Delivery Trucks
- BuBbLeS01
- · Replies 1 ·
Electric fields in a plane, :smile:
- JFonseka
- · Replies 6 ·
Solve Centripetal Force for m_1 in Frictionless Table
- klm
- · Replies 41 ·
How to calculate distance object traveled in completely inelastic collision?
- pebbles
- · Replies 1 ·
How Do You Calculate Angular Acceleration of a Cylinder?
- sheri1987
- · Replies 1 ·
Impulse and final velocity of billiard balls after collision
- pebbles
- · Replies 4 ·
Find the tension in each rope torque
- poloboy
- · Replies 4 ·
Maximum Deformation of Springs in a Collision: Deriving the Equations
- sumeer@dinsum.c
- · Replies 4 ·
Safer Collision: Front-end Damage vs. No Damage - Impulse-Momentum Theorem
- pebbles
- · Replies 5 ·
Calculating Average Force on a Vertical Wall from Ice Cube Collisions
- Pulk
- · Replies 5 ·
Two balls on a rod falling and hitting the ground
- troy5538
- · Replies 23 ·
What is the internal resistance r of the battery?
- robbondo
- · Replies 5 ·
How to Calculate Work Done by Friction without Coefficient of Friction?
- baseballer10p
- · Replies 18 ·
Potential Energy of a Conservative Force
- Jacobpm64
- · Replies 5 ·
Elevator 2 part Question - Box Dragging
- Larrytsai
- · Replies 8 ·
Work done stopping a car that decelerates over 25.5 m
- teriblekelly
- · Replies 4 ·
What is the speed of m2 after the spring is released?
- bulldog23
- · Replies 1 ·
Kinetic Energy Vs. Potential Energy confusion.
- teriblekelly
- · Replies 3 ·
Horizontal Speed of bullet fragment
- bulldog23
- · Replies 15 ·
Ball of mass rolling down an incline
- delecticious
- · Replies 2 ·
Calc Angular Accel of Solid Cylinder - FxR Method
- sheri1987
- · Replies 5 ·
Solving Momentum Conservation: Finding Velocity & Direction
- scott.leever
- · Replies 3 ·
Solve Forces and Acceleration for Two Crates in Contact - Casey
- Saladsamurai
- · Replies 3 ·
How do I show that each mass endures an equal and opposite change in momentum
- pebbles
- · Replies 8 ·
Linear programming constraints for skateboards and roller blades
- ineedhwhelp
- · Replies 6 ·
Calculating energy lost in collisions?
- pebbles
- · Replies 5 ·
How Do You Calculate Net Force on an Inclined Plane?
- JohnJay
- · Replies 1 ·
Boat crossing river at 1.50 m/s east, 10.0 m/s north relative to water
- Cowtipper
- · Replies 9 ·
Simple way to convert km/hr to m/s
- EvanVi
- · Replies 1 ·
Gravitational Potential Energy of an elevator
- BuBbLeS01
- · Replies 6 ·
Circular Motion: General Equations
- St@rbury
- · Replies 1 ·
Friction force between two sliding blocks on a horizontal surface
- Ahwleung
- · Replies 3 ·
Finding the orbital radius of a GPS satellite with 8-hour period
- Ryo124
- · Replies 36 ·
Merry-go-round rotation: time for first and second 2.53 revolutions
- shell4987
- · Replies 5 ·
Final speed of two billiard balls
- pebbles
- · Replies 4 ·
Is Kinetic Energy Direction-Dependent?
- BuBbLeS01
- · Replies 4 ·
Application with conservative and nonconservative forces
- Jacobpm64
- · Replies 2 ·
How Fast Does the Rim of a Spinning Disk Travel?
- Nitrag
- · Replies 1 ·
Finding spring constant from dart gun compression and muzzle velocity
- Oliviam12
- · Replies 2 ·
What Is the Angle of Initial Velocity for a Projectile at Half Maximum Height?
- Lmaonade
- · Replies 2 ·
Star temperature from B-V color
- poiuy
- · Replies 1 ·
Solving Enigmatic Physics Problems: Acceleration and Frictional Force Examples
- Flashtf
- · Replies 1 ·
Sound intensity is measured on a logarithmic scale
- matt23
- · Replies 1 ·