Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Threads
Rotational Inertia worked it many times.
- 1MileCrash
- · Replies 1 ·
Comparing Speed and Kinetic Energy in a Railroad Car Collision
- mitchmcsscm94
- · Replies 1 ·
Two common sense questions (solutions provided)
- flyingpig
- · Replies 1 ·
Time for light pass through glass
- badd99
- · Replies 4 ·
Coefficient of static friction between a ladder and a friction-less wall
- hanaelise23
- · Replies 3 ·
Finding individual masses of skaters pushed apart by a spring
- mcarloni
- · Replies 2 ·
Oscillation vs. Pendulum Periods
- 1MileCrash
- · Replies 1 ·
How Do Aerodynamics Affect an Airplane's Lift and Drag Forces?
- emperror123
- · Replies 3 ·
Can Two Batteries Power a Lunar Roving Vehicle Without Exceeding 9 Volts?
- Darth Frodo
- · Replies 2 ·
Mechanical Energy Staircase Problem
- kimberlyphys
- · Replies 6 ·
Calculate the difference in the strength of gravity
- blueyellow
- · Replies 7 ·
Time period of a torsional pendulum
- jackdean29
- · Replies 1 ·
Rotational Motion Speed at the top of the loop
- physgrl
- · Replies 1 ·
Rotational Motion Tension at the bottom of the circle
- physgrl
- · Replies 3 ·
Rotational Motion change angular rotational
- physgrl
- · Replies 3 ·
Minimum speed for a rock to travel 400 m from a sling
- Miike012
- · Replies 13 ·
Rotational Motion maximum speed
- physgrl
- · Replies 3 ·
Rotational Motion angular speed
- physgrl
- · Replies 2 ·
Electromagnetism - Boundary conditions for Polarization field at interface
- lmcelroy
- · Replies 1 ·
How to calculate threshold frequency of a metal
- Justin Hawk
- · Replies 1 ·
How Fast Must Superman Fly to Stop a Moving Train Safely?
- Smartguy94
- · Replies 2 ·
Solving Schrodinger Eq.: Quantum #s for n=0,1,2
- Airplane7
- · Replies 5 ·
Finding displacement from multiple legs in different directions
- C42711
- · Replies 12 ·
Solenoid, calculate number of coils
- JosephK
- · Replies 2 ·
How Does Motion Affect Photon Spacing and Relate to the Doppler Effect?
- bon
- · Replies 1 ·
Phase Difference between Sinusoidal Waves
- AdkinsJr
- · Replies 5 ·
What Determines Voltage Changes in LDR Darkness Sensors?
- Eisen
- · Replies 1 ·
Three masses on an incline with friction
- BitterX
- · Replies 5 ·
Ballistic pendulum with rotating arm: finding maximum swing angle
- xnitexlitex
- · Replies 3 ·
Block dropped onto vertical spring, finding work/speed/height
- cupcaked
- · Replies 1 ·
Velocity Question: Initial vs. Final Velocity at y=0
- Miike012
- · Replies 3 ·
Ballistic Pendulum kinetic energy
- QuarkCharmer
- · Replies 8 ·
Two particle interference (entanglement)
- 4everlonging
- · Replies 1 ·
Diffraction Grating Overlapping Orders
- Ailiniel
- · Replies 1 ·
How Does Firing a Gun on a Frictionless Surface Affect Recoil Velocity?
- QuarkCharmer
- · Replies 10 ·
Calculating ∅ in Simple Harmonic Motion Equation x = xo + Asin(ωt + ∅)
- pvpkillerx
- · Replies 6 ·
At what time is the acceleration of the marked point equal to g?
- BScFTW
- · Replies 4 ·
Finding Work Done by Force (F): Is it Fx or F?
- Miike012
- · Replies 1 ·
Liquid Flow Problem: Bernoulli's Principle & Volume Flow Rate
- fizziksplaya
- · Replies 8 ·
How Is Work Done by Friction Calculated in a Spring-Box System?
- deezy
- · Replies 3 ·
Vector Addition: Finding Displacement
- C42711
- · Replies 1 ·
Finding plane speed and direction with wind vector addition
- C42711
- · Replies 1 ·
Theoretical and Actual Acceleration for an Atwood Machine
- Pandaluvv2
- · Replies 4 ·
Ao frustrating find the tension
- rbailey5
- · Replies 1 ·
Free body diagram of passenger in accelerating train
- Fisics
- · Replies 3 ·
Weight, mass and density of metal block on spring balance
- lionely
- · Replies 14 ·
How Do You Calculate Current in a Composite Wire of Silver and Copper?
- jtw2e
- · Replies 6 ·
Finding peak Emf, pretty quick answer
- pyroknife
- · Replies 5 ·
What is the coefficient of friction for a bumpy hill sled problem?
- kayjaydee
- · Replies 2 ·
Equivalent Resistance and Branch Currents in Non-simple Circuits
- BeRiemann
- · Replies 3 ·
How Much Energy Is Lost to Friction in This Physics Problem?
- Saterial
- · Replies 1 ·
What potential difference means?
- Instinctlol
- · Replies 1 ·
Calculating Peak-to-Peak Amplitude of Out-of-Phase Sine Waves
- Sloan650
- · Replies 1 ·
Do all springs naturally obey Hooke's law?
- GreenPrint
- · Replies 1 ·
Potential Energy/Work done question AS Level Physics - Mechanics
- novamatt
- · Replies 4 ·
Calculating Energy Efficiency in a Cogeneration Power Plant
- treynolds147
- · Replies 1 ·
Potential energy and work by spring.
- Crusaderking1
- · Replies 8 ·
Work/energy - spring and inclined plane
- shawli
- · Replies 2 ·
Car rolling down 17° incline: finding speed at bottom
- gotpink74
- · Replies 15 ·
A bizarre question that I don't know where to begin
- Weather-pig
- · Replies 1 ·
Finding Vector Components using Trigonometry
- C42711
- · Replies 5 ·
Dynamics problem using Newton's third law.
- -Dragoon-
- · Replies 15 ·
An electric pump raise 9.1m^3 of water from a reservoir
- lionely
- · Replies 20 ·
Double slit experiment question?
- andyfox
- · Replies 1 ·
Photometry: Determining a binary star system.
- Lavabug
- · Replies 3 ·
How Do You Calculate Kinetic Energy and Constant Force in Physics Problems?
- shawli
- · Replies 3 ·
Electric flux through sphere with linear and point charges
- artsakh
- · Replies 6 ·
For n1 = 2.15 and n2 = 1.26, what is the critical angle so that all of
- Sloan650
- · Replies 11 ·
How Do You Calculate the Center of Mass for Irregular Objects?
- kthejohnster
- · Replies 1 ·
Mutual Induction of a solenoid and a coil
- shuangfei217
- · Replies 1 ·
A rope of 5m is fastened to two hooks 4m apart on a horizontal ceiling
- verb tense
- · Replies 26 ·
Equivalent capacitance A hard one?
- PwnagePanda
- · Replies 9 ·
Understanding Rotational Motion: Answers for Jade
- Jadenag
- · Replies 1 ·
Mass attached to a horizontal spring
- pvpkillerx
- · Replies 1 ·
Friction force on an inclined plane at 30 degrees
- Kameriders21
- · Replies 1 ·
Rotation Problem: Earth lengths/Apparent Weights
- a Vortex
- · Replies 3 ·
University Physics 1 Work Problem
- USN2ENG
- · Replies 7 ·
Finding car acceleration from pendulum angle in accelerating car
- phizics09
- · Replies 5 ·
Does a Boat Move When You Walk on It?
- alyafey22
- · Replies 17 ·
Coefficient of Friction/Projectile motion problem
- rmiller94
- · Replies 5 ·
Car braking distance with negative acceleration
- LinkinPark98
- · Replies 10 ·
Gravitational potential energy and rotational motion
- lindzzz
- · Replies 3 ·
Pendulum oscillation: angle for horizontal acceleration of bob
- nishantve1
- · Replies 1 ·
Finding Speed using Doppler Shift
- Toastminion
- · Replies 1 ·
Factors that effect sound waves in water?
- Josh03
- · Replies 1 ·
Calculating Electric Field Strength using Electric Potential?
- Inertigratus
- · Replies 9 ·
Basketball Vector/Kinematics Question
- ditde
- · Replies 7 ·
Can You Solve This Uniform Circular Motion Task in Physics?
- bini18
- · Replies 4 ·
Energy Problem (Systems and Energy Conversion)
- bigbro_mm
- · Replies 1 ·
What is the effect of angle on the speed of a thrown baseball?
- Crusaderking1
- · Replies 9 ·
Equilibrium and principle of triangle of forces
- verb tense
- · Replies 4 ·
What Is the Tension in a String During Simple Harmonic Motion?
- QuarkCharmer
- · Replies 8 ·
Acceleration of two packages on an incline
- Zontar
- · Replies 3 ·
Find the center of mass of a block of wood in oil
- Angie_Agnes
- · Replies 17 ·
Question regarding Calorimetry?
- Ishida52134
- · Replies 1 ·
Linear Mass Density: Find 8.9866e-4 m/s to g/m
- brianna0404
- · Replies 3 ·
Forces using Newtons Second law
- gotpink74
- · Replies 7 ·
Boat slowing down with velocity-dependent friction force
- rammer
- · Replies 8 ·
How Do You Calculate the Spring Constant of a Hanging Mass?
- Timebomb3750
- · Replies 8 ·
Calculating Angular Velocity of Earth's Daily, Yearly, and Monthly Motions
- valeriex0x
- · Replies 2 ·