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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Calculating Radius for Stone in Rotating Tire with Static Friction
- TastyTyr
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Where Can I Find Quality AP Physics Lecture Notes and Review Materials?
- Tiger257
- · Replies 1 ·
Elevator pulled upward by cable - find tension
- shawpeez
- · Replies 4 ·
Why does a swinging Atwood's machine work the way it does?
- fahd
- · Replies 2 ·
Finding Maximum Acceleration on a Box on a Cart with Friction
- amcavoy
- · Replies 5 ·
Solving a Photographic Puzzle: Comparing Heights of Images at Varying Distances
- mathzing
- · Replies 3 ·
Estimating the Effect of F-16 Engines on Earth's Rotational Speed
- willworkforfood
- · Replies 4 ·
Finding water mass in copper-water calorimetry problem
- Pengwuino
- · Replies 3 ·
Minimal acceleration for a 5g spider lowering itself on a web
- PhysicBeginner
- · Replies 15 ·
Finding coefficient of kinetic friction for a sliding puck without mass
- catapultum_habeo
- · Replies 2 ·
Calculating Relative Velocity for Walking on a Treadmill
- Jacobpm64
- · Replies 2 ·
How to Calculate Doppler Effect Frequencies for Moving Objects?
- Wen
- · Replies 1 ·
Terminal voltage of car battery being charged at 62.5 A
- lando45
- · Replies 5 ·
Kepler's Third Law: Proportional Orbit Period to Distance^1.5
- eku_girl83
- · Replies 1 ·
Error Propagation for F=4*pi^2*r*m/T^2
- badtwistoffate
- · Replies 9 ·
What forces are acting on the ant as it swings on a rotating rod?
- Wen
- · Replies 5 ·
Problem involving incline, spring and friction
- cgotu2
- · Replies 1 ·
Maximum upward force on a 22 kg box at 45° to keep it at rest
- F.B
- · Replies 1 ·
Tension problem involving Centriptal force
- Lucky14
- · Replies 3 ·
Beta decay - derive an expression relating source angle to energy
- Exulus
- · Replies 5 ·
Minimum velocity for hoop rolling up a step without slipping
- Wen
- · Replies 1 ·
Finding tension between connected 4 kg and 5 kg blocks pulled by 30 N
- SS2006
- · Replies 8 ·
Piano sliding down an incline - work problem
- confusedbyphysics
- · Replies 10 ·
Accelerations without friction problem
- jesuslovesu
- · Replies 2 ·
Power due to the force applied to the block by the cable?
- ViewtifulBeau
- · Replies 1 ·
What is g on a planet with twice Earth's radius and same density?
- PhysicBeginner
- · Replies 3 ·
How Can I Solve a Projectile Motion Problem Without Knowing the Mass?
- saschouch
- · Replies 6 ·
Finding normal force when pulling a sleigh at an angle
- F.B
- · Replies 5 ·
How Does Air Resistance Affect the Distance of Free Fall?
- eku_girl83
- · Replies 1 ·
How Did Roemer Measure the Speed of Light Using Jupiter's Moons?
- dekoi
- · Replies 1 ·
Solving for Initial Velocity in a Projectile Motion Basketball Shot
- NoMeGusta
- · Replies 5 ·
How Does Projectile Motion Determine a Football's Field Goal Success?
- kevinlikesphysics
- · Replies 1 ·
What is the Solution to the Roller Coaster Apparent Weight Problem?
- joseph harris
- · Replies 3 ·
How Do I Solve Forces in Physics Problems Like 1d and 1e?
- SS2006
- · Replies 4 ·
Calculating Final Position in Projectile Motion: A Case Study
- NoMeGusta
- · Replies 2 ·
Blocks, Friction Forces and Acceleration
- sunnyorange
- · Replies 4 ·
Why doesn't the transformer voltage formula work with a DC battery?
- pez
- · Replies 2 ·
Why Does My Electron Energy Calculation Keep Failing?
- brandon26
- · Replies 1 ·
Projectile motion of conservation of energy?
- firemanpato
- · Replies 5 ·
Finding the applied force on a 2 ft board against a wall at 30 degrees
- WhatTheBleepDoIKnow
- · Replies 8 ·
Determining the Minimum Length of a Plane Mirror to View a 5m Drawing
- charlie 42
- · Replies 1 ·
Sun Interference astronomy question
- lektor
- · Replies 3 ·
Launching marble upwards - Find speed
- lachlan81
- · Replies 2 ·
Solving Force Problems: Work Done from x=0 to x=4m
- brad sue
- · Replies 1 ·
Calculating Heat Energy from Falling Object
- dragon513
- · Replies 4 ·
Solve Tension on Wall-Hung Picture Frame Wire
- skialta
- · Replies 1 ·
Calculated the total time kinematics
- jacy
- · Replies 2 ·
Tension and acceleration with m1 = 2m2 on a pulley system
- amcavoy
- · Replies 7 ·
Max Speed to Maintain Road Contact over Bump
- Lnav1982
- · Replies 3 ·
How do orbits and forces affect planetary motion and satellite trajectories?
- Weatherkid11
- · Replies 2 ·
How Does a Model Train Transformer Work?
- jena
- · Replies 1 ·
Modeling Forces in Free Falling Chain Problem
- SN1987a
- · Replies 12 ·
Help with fluid pressure, Pascal's principle, and Dalton's law for physics test
- mathaTon
- · Replies 2 ·
Electric fields and de broglie wavelength
- ascky
- · Replies 3 ·
Why does a test charge attract both an unknown ball and an uncharged copper ball?
- hotmail590
- · Replies 6 ·
Calculating Initial Bullet Speed in Bullet-Block Collision on a Table
- billiam
- · Replies 3 ·
Why does Maxwell's theory say light speed is constant in all reference frames?
- Phymath
- · Replies 3 ·
How many ice cubes cool 200 liters of water from 25°C to 16°C?
- huskydc
- · Replies 9 ·
Find Maximum Elevation of Test Rocket
- jenc305
- · Replies 4 ·
What is the tension felt when a rock is dropped off a cliff connected to a rope?
- amcavoy
- · Replies 2 ·
Translatoral equlibrium question
- Elysium
- · Replies 1 ·
Why doesn't the applied force cancel in this mop handle friction problem?
- amcavoy
- · Replies 16 ·
Current in a 20-turn coil with changing magnetic field
- jena
- · Replies 2 ·
Solving Dynamics Problem of Two Colliding Spheres
- bartieshaw
- · Replies 7 ·
Calculating Instantaneous Power in a Uniformly Accelerating System
- lonely86driver
- · Replies 3 ·
What Is the Minimum Static Friction Coefficient to Keep a Block Motionless?
- Raiden9
- · Replies 7 ·
Calculate dropped ball acceleration question
- Michaelenetaylor
- · Replies 1 ·
Coin on turntable and wheat on conveyor belt
- cwgeary
- · Replies 1 ·
How Do You Calculate Frictional Force with Multiple Normal Forces?
- amcavoy
- · Replies 2 ·
Maximum height of golf drive at 15 degrees and shell flight time
- Keem
- · Replies 15 ·
How far does the truck travel in this time?
- SpicyQ
- · Replies 2 ·
Maximum voltage for three series resistors before one burns out
- nutster
- · Replies 2 ·
How Is Newton's Third Law Applied in Calculating Forces on a Lawn Mower?
- F.B
- · Replies 1 ·
Universal gravitation and inclines
- AdnamaLeigh
- · Replies 7 ·
Why Can't I Solve This Circuit Resistance Problem?
- gstatejoe
- · Replies 3 ·
What Is the Second Force Acting on a Particle in Constant Motion?
- Elysium
- · Replies 5 ·
Finding the Acceleration of a Moving Bus Using Newton's Laws
- tedjj
- · Replies 2 ·
Calculating Distance Traveled by a Point on a Rotating Wheel
- willworkforfood
- · Replies 4 ·
Projectile Motion - Elevated Target
- matrix0f8h
- · Replies 10 ·
Center of mass of a triangle (uniform density)
- Kenny Lee
- · Replies 5 ·
Solve the Balance: Meter Stick Mass Calculation
- ah-huh
- · Replies 1 ·
How Do You Calculate Work and Internal Energy from a Thermodynamic Graph?
- ice87
- · Replies 2 ·
What is the Mass of the Metre Stick?
- NMW
- · Replies 7 ·
Balaning metre-stick - Find the mass
- NMW
- · Replies 3 ·
Force Analysis of an Elevator Moving Upward
- ahh86
- · Replies 1 ·
How do you solve tension problems with pulleys and inclines?
- physixnot4me
- · Replies 2 ·
Solve for Tire Radius: Mass, Friction Coefficient, Normal Force, and Speed Given
- rockmorg
- · Replies 1 ·
Someone Explain these Concepts to ME
- NotaPhysicsMan
- · Replies 6 ·
Who first determined the value of absolute zero?
- jaidon
- · Replies 3 ·
How Do Currents in Adjacent Wires Affect Their Mutual Force?
- jena
- · Replies 2 ·
Velocity of Light vs Train: Why the Difference?
- ranger
- · Replies 4 ·
What Does a Scale Read for a Person in an Elevator Under Various Conditions?
- aceXstudent
- · Replies 11 ·
Really though relative motion/momentum question
- 404
- · Replies 2 ·
50kg sprinter's horizontal force and power output
- maki
- · Replies 2 ·
Calculating Work Done on a Train with Jet Engine Thrust?
- missyjane
- · Replies 4 ·
Forces on a basketball player and ground before jumping
- watarn
- · Replies 8 ·
Surviving a Fall: Calculating Velocity and Impulse for Safe Landings
- jakeowens
- · Replies 2 ·
Finding the Longest Wavelength for Interference Patterns
- mrjeffy321
- · Replies 5 ·
Baseball thrown at 24° and 29.3 m/s caught 65 m away
- RHSLilSweetie07
- · Replies 6 ·
Power required to raise 1 ton per meter per minute
- Inventor
- · Replies 2 ·