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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Why is current not considered to be a vector?
- PFStudent
- · Replies 2 ·
Calculating Recoil Velocity: Female Character in Diamonds Are Forever
- pdubb
- · Replies 2 ·
What is the length of the vibrating section of the violin string?
- Deviatorz
- · Replies 4 ·
What Bad Physics and Laws Are Broken in Jurassic Park III?
- zeyad
- · Replies 1 ·
Calculating the Sun's Power Output
- Jtappan
- · Replies 1 ·
Solving Solar Energy Problem: Collector Area Needed
- ghetto_bird25
- · Replies 4 ·
Special Relativity and Relative motion
- olga11
- · Replies 8 ·
Friction Problem: Find Time to Rest w/ Force of 5.0 N
- Lobos Wolfen
- · Replies 1 ·
Simple Harmonics - Kind of wierd
- kevinr
- · Replies 4 ·
Locating Object and Image with Converging Lens
- sbe07phy
- · Replies 1 ·
What Happens to Amplitude When One of Two Glued Balls on a Spring Detaches?
- kevinr
- · Replies 7 ·
Linear Velocity at Top (Rotational Kinematics)
- ddrtrinity
- · Replies 1 ·
People run faster than they walk
- black_squirrel
- · Replies 8 ·
What is the ratio of the amplitudes of the two waves?
- mathcrzy
- · Replies 3 ·
Free body diagram for block on rotating disk
- eggman2001
- · Replies 2 ·
Sweaty Biker and Energy Consumption
- yoshiko
- · Replies 1 ·
Average acceleration of a car turning from north to east in 2.0s
- sanado
- · Replies 3 ·
How does special relativity explain the Michelson-Morley experiment?
- ultimateroxas
- · Replies 1 ·
How Far Must a Small Piston Be Pushed to Lift a Larger One by 20 cm?
- jacob.jonathon
- · Replies 1 ·
What makes a parachute safe in a physics sense?
- NeKroA
- · Replies 4 ·
Determining length of highway deceleration ramp, with friction
- Satchmo
- · Replies 1 ·
Universal Gravitation Ice Rink Problem
- physicsbhelp
- · Replies 14 ·
Solve a Quick Math Question: How Many Sides in a Polygon w/ 119 Diagonals?
- get_rekd
- · Replies 2 ·
Satellite Problem: 2 Difficulties of Effective Communic.
- ultimateroxas
- · Replies 3 ·
AP Physics Free-Response Practice Question #2
- xpeachpleasurex
- · Replies 2 ·
Force between two parallel wires
- urszula
- · Replies 1 ·
AP Physics Free-Response Practice Question
- xpeachpleasurex
- · Replies 1 ·
How Can Torque Determine the Weight of an Unknown Object?
- ll Source ll
- · Replies 1 ·
Determination of planck's constant
- Ry122
- · Replies 9 ·
How much energy will be released when the meteor hits Jupiter?
- odie5533
- · Replies 4 ·
FM radio receiver circuit for KONG-FM vs KRUD-FM with 1% power ratio
- sbe07phy
- · Replies 1 ·
Gravitational equilibrium point between Earth and Moon, and cat pulling fishbowl problem
- theresa d
- · Replies 2 ·
The Final Temperature and Remaining Ice in a Calorimetry Experiment
- olso4142
- · Replies 2 ·
How Do You Calculate the Line Integral of a Magnetic Field Between Two Points?
- aliaze1
- · Replies 1 ·
A Refraction of Light Question : Why Does Diamond Sparkle More? (Ans. )
- incognito301
- · Replies 1 ·
Levitating a rod - magnetic field/forces
- aliaze1
- · Replies 3 ·
Solving Nylon Rope Fracture Problem Up to 25 kg Lift Height
- ssjdbz101
- · Replies 4 ·
Torque - Finding the unknown weight
- ll Source ll
- · Replies 4 ·
Decibels and intensity of police car siren
- Aphrael
- · Replies 4 ·
Spring constant and oscillation frequency
- aligass2004
- · Replies 5 ·
What is the Initial Angular Acceleration of a Disk Released from Rest?
- klm
- · Replies 2 ·
Current Through First Resistor in a Parallel Circuit
- get_rekd
- · Replies 4 ·
Work to move a sodium ion across a cell membrane
- trustabdy
- · Replies 9 ·
How many revolutions does a washing machine tub make during a spin cycle?
- ~christina~
- · Replies 7 ·
What Is the Average Speed of a Motorist Traveling Different Speeds?
- rcmango
- · Replies 1 ·
Calculate Intensity of Sound Wave at Cliff from Radio Source
- kokenwa
- · Replies 3 ·
A few problems (forces, energy, gravitation)
- Destrio
- · Replies 2 ·
What is the maximum angle for a ladder to lean against a wall without slipping?
- fifth0
- · Replies 2 ·
Constructive/Destructive Stereo Interference
- biomajor009
- · Replies 1 ·
Equillibrium ladder on a wall problem
- odie5533
- · Replies 4 ·
Finding the Minimum and Maximum Speed on a Sloped Surface
- NewatPhysics
- · Replies 6 ·
Direction of the frictional force
- rootX
- · Replies 2 ·
Calculating Spring Constant for SHM with Bullet Impact
- Aphrael
- · Replies 14 ·
Transverse speed of string point when displacement is 12.0 cm
- zjm7290
- · Replies 1 ·
What is the relationship between A_{c} and A_{s} in simple harmonic motion?
- Rubidium
- · Replies 2 ·
How Does Momentum Affect Motion in Different Scenarios?
- JRKnights014
- · Replies 2 ·
Difference between potential energy on Earth and in orbit
- Lorna
- · Replies 8 ·
Spring Problem and average force
- temaire
- · Replies 4 ·
What Are the Outcomes of a Tennis Ball and Basketball Elastic Collision?
- latitude
- · Replies 1 ·
Period/Frequency of a Rotational Object
- BBallman_08
- · Replies 7 ·
Solve Circuit: Find ΔQ for Switch T Turned Off
- hastings
- · Replies 2 ·
Why does constant velocity give zero force when lifting?
- alex7298
- · Replies 3 ·
Distance from sun's center to the sun-Earth center of mass
- quickclick330
- · Replies 10 ·
Resonant frequency and wire tension in closed tube with oscillating wire
- ghetto_bird25
- · Replies 3 ·
What happens when a bug lands on a spinning sphere?
- Epiphone
- · Replies 9 ·
Potential Energy in to Kinetic Experiment
- Larrytsai
- · Replies 1 ·
What is the Next Step in Calculating Wavelength for Singly Ionized Helium?
- Ry122
- · Replies 9 ·
Why do runners bend their legs and how to tear paper with one hand?
- lusterjester
- · Replies 1 ·
Calculate the speed of the particle
- mkwok
- · Replies 2 ·
How many meters does the spring compress?
- linnus
- · Replies 1 ·
Aluminum pendulum clock losing time at lower temperature
- BBallman_08
- · Replies 15 ·
How Does a Rotating Charged Particle Beam Maintain Focus?
- jughead4466
- · Replies 1 ·
Force and power in a moving conducting bar in a magnetic field
- PurpleMist
- · Replies 1 ·
Interference with two speakers
- gills
- · Replies 2 ·
How Does Non-Conservative Force Affect Mechanical Energy Along Different Paths?
- keltix
- · Replies 7 ·
What Is the Minimum Energy Required for a Proton to React with Lithium?
- Ry122
- · Replies 1 ·
Computing Mass of gas molecule from specific heat
- Saladsamurai
- · Replies 1 ·
Rotational Dynamics Practice Problems
- rwx1606
- · Replies 2 ·
Why Are Both Angles the Same in an Inclined Plane Pulley System?
- xcgirl
- · Replies 3 ·
Why do a dropped ball and horizontal projectile land simultaneously?
- Jbum
- · Replies 12 ·
Why do runners bend their legs and how to tear paper with one hand?
- lusterjester
- · Replies 1 ·
How Does Moving Closer to the Fulcrum Affect Teeter-Totter Balance?
- odie5533
- · Replies 1 ·
Calculating Energy Usage of a Hair Dryer
- aquamarine08
- · Replies 2 ·
How Does a Ladder in Equilibrium Affect the Forces on a Window and Ground?
- B-80
- · Replies 1 ·
Elastic collision in two dimensions
- linnus
- · Replies 2 ·
When do I use the Pythagorean method to add vectors?
- MoreZitiPlease
- · Replies 8 ·
Visualizing the Biot-Savart Law for a current element
- PFStudent
- · Replies 4 ·
About Kinetic energy of circular motion
- jack1234
- · Replies 6 ·
Distance between tourques/forces
- natedigity
- · Replies 1 ·
Solving Pendulum Problem (b): Kinetic & Potential Energy
- jack1234
- · Replies 4 ·
How can I calculate the force of friction on a rocket launched at school?
- xCanx
- · Replies 1 ·
Work Through a Displacement At An Angle
- mircobot
- · Replies 1 ·
What Happens to Momentum in a Perfectly Elastic Wall Collision?
- Dorney
- · Replies 5 ·
When to use cos and sin for force components on an incline?
- chemboy
- · Replies 3 ·
How to Cut Metal to Produce Specific Musical Notes?
- BarCode
- · Replies 1 ·
Determine the fraction of the volume
- olso4142
- · Replies 2 ·
What is the velocity of m when it reaches point P?
- ahello888a
- · Replies 8 ·
How do I find the average force when landing from a jump?
- Joza
- · Replies 7 ·
Fictitious force and accelerating airplane
- hotcommodity
- · Replies 6 ·
Spring Ramp Problem: Maximum Distance for Compressed Spring Calculation
- BBallman_08
- · Replies 2 ·