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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Radial Force on a Spinning Merry-Go-Round
- lizzyb
- · Replies 3 ·
Calculating Velocity of Clothes in a Dryer
- Dorothy Weglend
- · Replies 16 ·
Understanding Centripetal Force Lab Calculations
- Stevedye56
- · Replies 4 ·
What is the original kinetic energy of the player?
- needhelp83
- · Replies 1 ·
Vectors and Forces: Aircraft Mass, Velocity & Drag Force
- CathyLou
- · Replies 13 ·
What are the forces acting on the tow-truck?
- matthew77ask
- · Replies 4 ·
Pullin a string to add energy to a wheel
- thinktank75
- · Replies 8 ·
Find the Angle of a Sliding Solid on a Ball: Step-by-Step Guide
- mohlam12
- · Replies 13 ·
Why Does a Compass Needle Dip Downward?
- -_-'
- · Replies 2 ·
Force and Projectile Motion Questions
- Canadian
- · Replies 1 ·
What Is the Jet Stream Wind Speed Affecting East-West Flight Durations?
- jdlenner
- · Replies 3 ·
What does the moment of inertia depend on?
- Meowzers
- · Replies 2 ·
Rocket Experiment: Why Calculations Were Off
- jnimagine
- · Replies 1 ·
Can a Metal Box Effectively Shield a Sensitive Magnetic Instrument?
- Amith2006
- · Replies 8 ·
Calculating Frictional Force on a Sliding Bead
- rkslperez04
- · Replies 13 ·
Momentum problem : bullet and chair
- bigredd87
- · Replies 13 ·
Graphing rotation & linear quantites
- thinktank75
- · Replies 9 ·
Why Does an Aluminium Rod Slow Down When a Current is Produced?
- L89
- · Replies 2 ·
Find Coefficient of Friction: Grindstone Problem
- Arielf04
- · Replies 2 ·
How to Calculate Determinants for a Matrix with Linear Algebra?
- Perrry
- · Replies 1 ·
Distance Rolled by 2.2cm Coin in 9.034s
- starfish794
- · Replies 3 ·
Angular acceleration of a softball
- physics1234
- · Replies 1 ·
Calculating Mass of Cart After Transfer of Energy with a Running Boy
- Pizall
- · Replies 14 ·
How Do You Calculate Electric Potential with Opposite Charges?
- ngkamsengpeter
- · Replies 1 ·
Work Definition: Force x Distance vs. Force x Displacement
- Fizziks_Fan
- · Replies 5 ·
Rocket experiment: conservation of energy
- jnimagine
- · Replies 1 ·
Velocity of Wind: Calculate Direction & Speed
- lia
- · Replies 1 ·
What is the Lagrange Point Between Jupiter and the Sun for a Space Probe?
- Forceflow
- · Replies 4 ·
Work Force Questions: Explaining Why Work Done is Zero
- parwana
- · Replies 10 ·
Two skaters with masses of 62 kg and 50 kg
- nx2000
- · Replies 13 ·
What is the approximate diameter of the moon.
- zman459
- · Replies 1 ·
Calculating the Angle Between Two Vectors
- needhelp83
- · Replies 10 ·
How Do You Calculate the Height of a Wedge in a Physics Problem?
- parwana
- · Replies 13 ·
Projectile motion skateboarder help
- NIZBIT
- · Replies 17 ·
Momentum and Impulse during a collision
- kirbykirbykirby
- · Replies 13 ·
Conservation of Momentum in Collisions
- TheHamburgler1
- · Replies 4 ·
What Is the Angle Where a Mass Leaves a Frictionless Sphere?
- Newton's Protege
- · Replies 1 ·
Calculating Average Force: Hockey Goalie Stops 59m/s Puck in 0.0021s
- TheHamburgler1
- · Replies 2 ·
How Do Phase and Group Velocities Behave in Relativistic Electron Waves?
- Mindscrape
- · Replies 1 ·
Explaining the Ripple Effect in a Circular Wave Pulse
- Mindscrape
- · Replies 1 ·
How Does Momentum Change Affect Force on a Wall with Rebounding Ice Cubes?
- Touchme
- · Replies 2 ·
How Does Angular Momentum Affect a Skater's Spin?
- mikefitz
- · Replies 2 ·
Understanding the Physics: Solving the Bowling Ball Problem in Lecture Halls
- parwana
- · Replies 4 ·
Difference between hooke's law and the work done in a spring?
- dnt
- · Replies 3 ·
Solving a Block and Inclined Plane Problem
- konichiwa2x
- · Replies 1 ·
What Is Being Disturbed in a Wave of Light?
- Jozers
- · Replies 1 ·
Rolls down a ramp and bounces back up
- Captain Zappo
- · Replies 4 ·
Motion of ring/body down an incline
- konichiwa2x
- · Replies 3 ·
Projectile Motion #3: Cross River in 47s at 3.64 m/s
- Kildars
- · Replies 4 ·
Solving Hard Problems in Physics: Finding Minimum Force and Acceleration
- allblonde
- · Replies 2 ·
Damped Oscillations: Mass 300 g, k=1.50 N/m, b in kg/s
- physicsgurl123
- · Replies 1 ·
Center of Gravity Question: Pretty Tough Conceptually
- cheechnchong
- · Replies 11 ·
New to Physics? Get Help on Roller Coaster Speed Question
- Pizall
- · Replies 13 ·
Resolution of forces(tension force)
- bkvitha
- · Replies 4 ·
Rubber wheel (angular acceleration)
- FossilFew
- · Replies 3 ·
Solving Weight Distribution for Iron Bar: 2 Man Problem
- konichiwa2x
- · Replies 7 ·
Calculating Velocity of a Block After Release from a Spring
- youxcrushxme
- · Replies 2 ·
Understanding Forces in a Bosun Chair System
- OVB
- · Replies 2 ·
Find the moment of inertia of a hoop
- trajan22
- · Replies 1 ·
Impulse and momentum of a cart down a ramp
- ysk1
- · Replies 1 ·
Question;weights,faulty balance
- konichiwa2x
- · Replies 4 ·
Help with internal energy please
- student85
- · Replies 7 ·
Spting Balance in Space(no calculations)
- Fusilli_Jerry89
- · Replies 1 ·
Spring-launched rollercoaster problem
- mst3kjunkie
- · Replies 1 ·
Kinetic friction between the box and the ramp
- allblonde
- · Replies 6 ·
Conservation of Energy - Swing Problem
- AVD
- · Replies 7 ·
The Utility of Apparent Weight in Accelerating Reference Frames
- Dorothy Weglend
- · Replies 10 ·
Solve for Projectile Motion: Maximum Altitude, Time of Flight, and Range
- Kildars
- · Replies 3 ·
Torsional Pendulum Uses and Experiment Re-Testing
- Aleksandar
- · Replies 1 ·
Calculate Speed of Light & Heavier Car After Collision at Intersection
- bobby3280
- · Replies 6 ·
O Physics: Finding Heat Capacity and Entropy Change in Thermal Processes
- kel
- · Replies 5 ·
Circular disk rotates with student on it
- bearhug
- · Replies 4 ·
Action-Reaction Pairs: What Are They?
- OVB
- · Replies 3 ·
How to solve for final velocity of object pushed by spring using concept of engergy
- divgrad
- · Replies 3 ·
Why Was Our Rocket's Calculated Height So Different from the Actual Height?
- jnimagine
- · Replies 6 ·
What is the initial speed of the ball as it rolls up an inclined ramp?
- bearhug
- · Replies 2 ·
Projectile Motion of a ball shot into the air
- Kildars
- · Replies 19 ·
Friction and Forces: Solving Physics Problems with Newton's Laws
- adventq
- · Replies 24 ·
Solving Physics Question: Momentum Change of 0.42 kg Ball
- draconicspectre
- · Replies 1 ·
Solve Connected Blocks Problems: Magnitude of Force & Tension Calculations
- S_fabris
- · Replies 3 ·
Space Elevator - Your take on an exam question
- Stevecgz
- · Replies 1 ·
Electric field and potential at a point
- Amith2006
- · Replies 3 ·
Energy Transformation equation for a free fall
- jman1114
- · Replies 1 ·
Measuring refractive index of liquid using lens and mirror
- blackcat
- · Replies 24 ·
Conceptual question; cylinder moving up an inclined plane
- konichiwa2x
- · Replies 6 ·
Projectile Motion - Seems easy.
- Kildars
- · Replies 14 ·
Centripetal and Tangitial Accelerations: Some Help please
- cheechnchong
- · Replies 4 ·
Calculating Force of Hail Stones on a Roof
- binicle
- · Replies 9 ·
How Is Acceleration Calculated in a Frictionless Pulley System?
- mst3kjunkie
- · Replies 1 ·
Trying to find Velocity and Kinetic Energy
- Rhaen
- · Replies 3 ·
Calculating Tension in a Pulley Weight System
- konichiwa2x
- · Replies 2 ·
How Far Does a Rolling Coin Travel Before Stopping?
- physics1234
- · Replies 1 ·
Calculate Coefficient of Kinetic Friction for Sliding Block - Spring Problem
- cd80187
- · Replies 7 ·
Verification needed - Rollar Coaster
- rkslperez04
- · Replies 4 ·
Why is the coefficient of friction unitless?
- Fusilli_Jerry89
- · Replies 10 ·
How Does Raindrop Angle and Speed Change with Car Direction?
- bobbarkernar
- · Replies 1 ·
How Do You Derive the Work Formula for a Mass Moving Against Gravity?
- metalmagik
- · Replies 8 ·
A bullet droppet and a bullet fired
- TSN79
- · Replies 4 ·
Calculating Baseball Travel Time and Distance: 165 km/h, 18.3 m
- Kildars
- · Replies 15 ·