Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Threads
Who Exerted More Work and Power: Paul or Mark on the Incline?
- xxWhiteWalkerxx
- · Replies 7 ·
Understanding Work Calculations with Inclines
- Sarah00
- · Replies 10 ·
Calculating Heat of Vaporization for Ethyl Alcohol at 65°C
- nmi13
- · Replies 8 ·
Calculating Electric Potential at the Center of a Half Spherical Shell
- hellojojo
- · Replies 3 ·
Piston/bullet inelastic collision (not like other problems)
- Kyle2016
- · Replies 7 ·
Question in mechanics (most of the material)
- eli meril
- · Replies 5 ·
Does reflecting sunlight from white roofs increase atmospheric temperature?
- ishag
- · Replies 7 ·
Static equilibrium, machines; handheld press
- J-dizzal
- · Replies 2 ·
What Is the Speed of a Charged Ball Exiting a Box?
- nmsurobert
- · Replies 16 ·
Inelastic collision of plane onto a barge? (challenging)
- lowea001
- · Replies 2 ·
Finding tensions T1 and T2 in a system with forces at 60° and 40°
- Zynoakib
- · Replies 4 ·
Planets and satellites, law of periods circular orbit.
- J-dizzal
- · Replies 15 ·
Maximum mass of a metal you can melt; Heat of Transformation
- KAC
- · Replies 13 ·
Finding black hole mass from Schwarzschild radius
- Hannahj1
- · Replies 2 ·
Heisenberg Uncertainty in wavelength and position
- Feynman.12
- · Replies 6 ·
Finding lowest visible mark in 80-cm water tank by refraction
- ann2080
- · Replies 3 ·
Car-Truck Collision: Initial Common Velocity
- Mr.somebody
- · Replies 3 ·
Gravity and superpostion of two spheres
- J-dizzal
- · Replies 5 ·
Friction/spring/inclined plane problem
- Alex.malh
- · Replies 7 ·
Relationship between wavelength and frequency in a medium
- KaseyKC
- · Replies 6 ·
Classic Static Electricity Balloon Example
- grgrlee
- · Replies 1 ·
Cannon shooting emergency packets
- naianator
- · Replies 6 ·
Describe the EMF induced by a magnetic field
- Mr Davis 97
- · Replies 2 ·
Find the frequency of the oscillation of a horizontal beam.
- Ishaan S
- · Replies 3 ·
Surface Charge Density (Electric Fields)
- Jimbob999
- · Replies 13 ·
Log hanging from 2 steel wires. stress/strain youngs modulus
- J-dizzal
- · Replies 8 ·
How Should the Child's Acceleration Be Calculated to Catch the Thrown Ball?
- Maximusw47
- · Replies 2 ·
Electrostatics: 3 Charges In An Equilateral Triangle
- hellojojo
- · Replies 2 ·
Ttorque angular acceleration units check
- mstram
- · Replies 3 ·
Solving a Physics Problem Using Archimedes Principle
- Tanya Sharma
- · Replies 39 ·
What is the Work Done by Normal Forces in a Children's Slide?
- lavankohsa
- · Replies 20 ·
Static equilibrium, trusses/section method
- J-dizzal
- · Replies 18 ·
Static equilibrium problem -- with a pulley
- J-dizzal
- · Replies 9 ·
Calculating Work and Kinetic Energy in a Two Mass Pulley System
- Diego Cunha
- · Replies 5 ·
Tension in cables supporting a neon sign with three cats
- cassie123
- · Replies 8 ·
How far can a 68 kg person walk on 22 g of carbohydrates?
- KAC
- · Replies 3 ·
Instantaneous speed and velocity
- takando12
- · Replies 14 ·
Finding potential difference across parallel resistors in mixed circuit
- Lim Y K
- · Replies 6 ·
Description of electric potential difference?
- toforfiltum
- · Replies 2 ·
How do you derive the pV Work formula, W= "integral"pdV?
- KingDaniel
- · Replies 7 ·
Snell's law problem about the angle of a wave and the coast
- Nightsheron
- · Replies 2 ·
Maximum time to pull a tablecloth from under a glass 6 inches from the edge
- jbunniii
- · Replies 4 ·
Contact forces between three boxes accelerating together
- cassie123
- · Replies 5 ·
How Is Incident Power Transmitted When Light Hits Water?
- KaseyKC
- · Replies 3 ·
Voltage drop for a charged capacitor
- jengfin
- · Replies 12 ·
"Common" relativistic variables.
- GravitonDiet
- · Replies 1 ·
Finding initial bullet velocity in collision with 7kg block
- Imbadatphysics
- · Replies 3 ·
Will a rocket booster ejected at 2100 km altitude return to Earth?
- Hannahj1
- · Replies 3 ·
Moment of inertia (formula problem)
- sseebbeekkk
- · Replies 7 ·
When is the Electric Potential 0
- Katran0595
- · Replies 4 ·
How Does Mass and Speed Affect the Circular Motion of a Rod with Attached Putty?
- rpthomps
- · Replies 9 ·
QM: Calculate Transmission Coefficient
- JuHanKim
- · Replies 1 ·
When do two charged pendulums at the same level have equal angles?
- THE BEAST
- · Replies 5 ·
Finding the Potential Difference In Parallel Capacitors
- r0306
- · Replies 4 ·
How to Determine Forces in Members BC and CG Using the Section Method?
- J-dizzal
- · Replies 1 ·
What Is the Maximum Acceleration of a 75g Object on a Spring?
- Imbadatphysics
- · Replies 6 ·
Finding Forces in Truss Members Using Method of Sections
- J-dizzal
- · Replies 3 ·
Why aluminum rod must be shorter if both rods stay 2cm apart
- Avaron Cooper
- · Replies 3 ·
Temperature controlling system with peltier battery?
- ugi_89
- · Replies 2 ·
Entropy Change in a System with a Man Drinking Water
- scharry03
- · Replies 4 ·
Initial and long-time current in an RC circuit with a switch
- Luke Cohen
- · Replies 16 ·
Finding magnitude and direction of three 50-unit vectors at 20°, 160°, and 270°
- Kathy W
- · Replies 3 ·
Show change in de Broglie wavelength from change in speed
- Feynman.12
- · Replies 8 ·
Work/Energy equation on inclined plane
- shaunchattey
- · Replies 9 ·
Finding net force on an object in a free body diagram
- BlueLine
- · Replies 5 ·
Momentum and Kinetic Energy, Elastic Collision
- cassie123
- · Replies 5 ·
Why Does Mass M Move at u/cosθ in a Pulley System?
- Prannoy Mehta
- · Replies 5 ·
Equal masses on a pulley: why does horizontal motion change heights?
- erisedk
- · Replies 20 ·
How Does the Angle of Tilt Affect Gyroscope Precession Rate?
- J-dizzal
- · Replies 5 ·
Can You Calculate the Splash Radius of a Rock Dropped from a Bridge?
- Entr0py
- · Replies 6 ·
Why convert sine to cosine when deriving the law of reflection
- KaseyKC
- · Replies 1 ·
Gravitation - Changing Orbit Dynamics
- Lord Anoobis
- · Replies 2 ·
Work done pulling object up an incline at constant speed
- Sarah00
- · Replies 27 ·
How does the loader's linear momentum change after turning south?
- cassie123
- · Replies 6 ·
Angular momentum of ball problem
- J-dizzal
- · Replies 4 ·
What is the force on the safety strap when stopping a fall at 1 meter?
- Postal Pete
- · Replies 7 ·
Finding error in friction problem with two applied forces at 37 degrees
- Sarah00
- · Replies 3 ·
Newtonian gravity theory and energy
- Lord Anoobis
- · Replies 5 ·
How Do You Derive the Acceleration Function from a Given Velocity Equation?
- david98999
- · Replies 4 ·
Pressure exerted by water on Sphere partially exposed at end
- iitjee10
- · Replies 10 ·
Conservation of momentum in one direction (add or subtract?)
- Chris Jarvis
- · Replies 3 ·
Automobile velocity on the bridge
- Juraj S
- · Replies 3 ·
System of hollow cylindrical conductors
- gruba
- · Replies 2 ·
Four-resistor one-capacitor RC circuit with switch
- fmd826
- · Replies 7 ·
Telescope Lenses: Focal Lengths 20cm/1cm/100cm/5cm/10cm/2cm/25cm/75cm
- Bostonpancake0
- · Replies 3 ·
How far from the start do John and Derek meet on their trip?
- mike rach
- · Replies 2 ·
Static equilibrium of a beam, 2 force and 3 force member?
- J-dizzal
- · Replies 14 ·
Two block on each other with friction
- Sarah00
- · Replies 4 ·
Why does a ring reach the bottom slower than a disk or sphere rolling down an incline?
- Avaron Cooper
- · Replies 8 ·
Free body diagram drawing for a two force members on machine
- lion_
- · Replies 1 ·
Mechanics of materials torque on solid shaft
- MrJoseBravo
- · Replies 7 ·
Correction to non relativistic KE
- ognik
- · Replies 19 ·
What exactly is the total energy ?
- Olijet
- · Replies 2 ·
Calculate Work Done by Force (152N): 1657.2J
- DaDoctor
- · Replies 5 ·
What is the deformation of a shaft under axial loading?
- MrJoseBravo
- · Replies 2 ·
Angle below horizontal projectile question
- jdang
- · Replies 4 ·
A dielectric-filled parallel-plate capacitor has plate area
- onestar_
- · Replies 1 ·
Calculating Time and Distance for Car Overtaking at Different Speeds
- anandtr2006
- · Replies 8 ·
Projectile Problem: Horizontal Velocity Analysis
- Shahab Mirza
- · Replies 3 ·
Motion Problem Constant Acceleration from 10 to 50 m/s in 2 secs
- Shahab Mirza
- · Replies 11 ·