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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Velocity of an electron exam question
- eltel2910
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How Does a Spherometer Measure Curvature?
- blackcat
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Block floating at the interface between mercury and water
- gunblaze
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Radial Force on a Spinning Merry-Go-Round
- lizzyb
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Calculating Velocity of Clothes in a Dryer
- Dorothy Weglend
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Understanding Centripetal Force Lab Calculations
- Stevedye56
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What is the original kinetic energy of the player?
- needhelp83
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Aircraft at constant velocity with 225 kN thrust and drag force 10v²
- CathyLou
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What are the forces acting on the tow-truck?
- matthew77ask
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Pullin a string to add energy to a wheel
- thinktank75
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At what angle does a sliding solid leave a ball?
- mohlam12
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Why Does a Compass Needle Dip Downward?
- -_-'
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Force and Projectile Motion Questions
- Canadian
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What Is the Jet Stream Wind Speed Affecting East-West Flight Durations?
- jdlenner
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What does the moment of inertia depend on?
- Meowzers
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Rocket Experiment: Why Calculations Were Off
- jnimagine
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Can a Metal Box Effectively Shield a Sensitive Magnetic Instrument?
- Amith2006
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Calculating Frictional Force on a Sliding Bead
- rkslperez04
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Bullet lodging in chair sliding on wooden floor
- bigredd87
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Matching position, velocity, and angular graphs for a spinning wheel
- thinktank75
- · Replies 9 ·
Why Does an Aluminium Rod Slow Down When a Current is Produced?
- L89
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Find Coefficient of Friction: Grindstone Problem
- Arielf04
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How to Calculate Determinants for a Matrix with Linear Algebra?
- Perrry
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Distance Rolled by 2.2cm Coin in 9.034s
- starfish794
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Angular acceleration of a softball
- physics1234
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Calculating Mass of Cart After Transfer of Energy with a Running Boy
- Pizall
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How Do You Calculate Electric Potential with Opposite Charges?
- ngkamsengpeter
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Work Definition: Force x Distance vs. Force x Displacement
- Fizziks_Fan
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Rocket experiment: conservation of energy
- jnimagine
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Finding wind velocity and direction from airplane and resultant motion
- lia
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What is the Lagrange Point Between Jupiter and the Sun for a Space Probe?
- Forceflow
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Why normal force and static friction do no work on objects
- parwana
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Two skaters with masses of 62 kg and 50 kg
- nx2000
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What is the approximate diameter of the moon.
- zman459
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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 ·
Skateboarder launching from 30° ramp at 7 m/s
- NIZBIT
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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
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Calculating Average Force: Hockey Goalie Stops 59m/s Puck in 0.0021s
- TheHamburgler1
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How Do Phase and Group Velocities Behave in Relativistic Electron Waves?
- Mindscrape
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Ripples moving inward in a circular wave pulse using group and phase velocity
- Mindscrape
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How Does Momentum Change Affect Force on a Wall with Rebounding Ice Cubes?
- Touchme
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How Does Angular Momentum Affect a Skater's Spin?
- mikefitz
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Why doesn't the pendulum ball hit the demonstrator on its return swing?
- parwana
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Difference between hooke's law and the work done in a spring?
- dnt
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Solving a Block and Inclined Plane Problem
- konichiwa2x
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What Is Being Disturbed in a Wave of Light?
- Jozers
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Rolls down a ramp and bounces back up
- Captain Zappo
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Motion of ring/body down an incline
- konichiwa2x
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Projectile Motion #3: Cross River in 47s at 3.64 m/s
- Kildars
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Solving Hard Problems in Physics: Finding Minimum Force and Acceleration
- allblonde
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Damped Oscillations: Mass 300 g, k=1.50 N/m, b in kg/s
- physicsgurl123
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Finding center of gravity for a composite shape
- cheechnchong
- · Replies 11 ·
A roller coaster traveling at 20 m/s climbs a 15m high hill. What is its final speed?
- Pizall
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Resolution of forces(tension force)
- bkvitha
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Rubber wheel (angular acceleration)
- FossilFew
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Weight on a man when an iron bar tilted at angle alpha
- konichiwa2x
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Calculating Velocity of a Block After Release from a Spring
- youxcrushxme
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Understanding Forces in a Bosun Chair System
- OVB
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Find the moment of inertia of a hoop
- trajan22
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Impulse and momentum of a cart down a ramp
- ysk1
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Question;weights,faulty balance
- konichiwa2x
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Why is Q = W in an isothermal process if ΔT = 0?
- student85
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Spting Balance in Space(no calculations)
- Fusilli_Jerry89
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Spring-launched rollercoaster problem
- mst3kjunkie
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Kinetic friction between the box and the ramp
- allblonde
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Conservation of Energy - Swing Problem
- AVD
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The Utility of Apparent Weight in Accelerating Reference Frames
- Dorothy Weglend
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Solve for Projectile Motion: Maximum Altitude, Time of Flight, and Range
- Kildars
- · Replies 3 ·
Torsional Pendulum Uses and Experiment Re-Testing
- Aleksandar
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Finding speeds of two cars in an inelastic collision using friction
- bobby3280
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O Physics: Finding Heat Capacity and Entropy Change in Thermal Processes
- kel
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Circular disk rotates with student on it
- bearhug
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Action-Reaction Pairs: What Are They?
- OVB
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How to solve for final velocity of object pushed by spring using concept of engergy
- divgrad
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Why Was Our Rocket's Calculated Height So Different from the Actual Height?
- jnimagine
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What is the initial speed of the ball as it rolls up an inclined ramp?
- bearhug
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Projectile Motion of a ball shot into the air
- Kildars
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Help with Newton's laws problems: throwing rocks, inclined blocks, and friction
- adventq
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Solving Physics Question: Momentum Change of 0.42 kg Ball
- draconicspectre
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Force between connected blocks and tension in string system
- S_fabris
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Space Elevator - Your take on an exam question
- Stevecgz
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Electric field and potential at a point
- Amith2006
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Energy Transformation equation for a free fall
- jman1114
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Measuring refractive index of liquid using lens and mirror
- blackcat
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Conceptual question; cylinder moving up an inclined plane
- konichiwa2x
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Projectile Motion - Seems easy.
- Kildars
- · Replies 14 ·
Angular speed, tangential speed, and centripetal acceleration of Earth's orbit
- cheechnchong
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Calculating Force of Hail Stones on a Roof
- binicle
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How Is Acceleration Calculated in a Frictionless Pulley System?
- mst3kjunkie
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Trying to find Velocity and Kinetic Energy
- Rhaen
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Calculating Tension in a Pulley Weight System
- konichiwa2x
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Rolling coin with 2.20 cm diameter and initial angular speed 15.9 rad/s
- physics1234
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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 ·