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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Calculating Net Gravitational Force in Equilateral Triangle Configuration
- QuantumKnight
- · Replies 5 ·
Why must a water skier at constant velocity lean back?
- Lola Luck
- · Replies 13 ·
Relative position and velocity question (Two dimensions)
- kappakeepo
- · Replies 4 ·
Calculating pressure in high altitude?
- dmk90
- · Replies 6 ·
What is the Acceleration of a Spherical Shell Filled with Fluid on an Incline?
- postfan
- · Replies 42 ·
Center of Mass Velocity in Elastic Collision
- postfan
- · Replies 9 ·
How Does Rotating a Wire in a Magnetic Field Affect Force and Current?
- EgpYo
- · Replies 7 ·
Electrostatic potential energy of a cubical configuration
- Lamp Guy
- · Replies 6 ·
Finding Magnetic Field using Lorentz Force
- derrickb
- · Replies 6 ·
What is the stiffness of the spring in a child's pogo stick?
- Charles Stark
- · Replies 11 ·
Node Method Problem: Identifying Errors
- LongApple
- · Replies 3 ·
What Is the Net Electric Force in a DNA Hydrogen Bond?
- StormPix
- · Replies 3 ·
What does "sum of voltage x1 due to v1" mean?
- LongApple
- · Replies 3 ·
A speck of dust that carries charge in a electric field?
- Tangeton
- · Replies 4 ·
How do + and - polarity markings on resistors affect power calculations?
- LongApple
- · Replies 5 ·
Relating Volume Charge Density and Linear Charge Density
- acdurbin953
- · Replies 5 ·
Momentum/Impulse- Calculating Average Force of Raindrops
- MadTay
- · Replies 3 ·
Tennis Ball Dropped: Will It Ever Come to Rest?
- arpon
- · Replies 11 ·
Does the ball clear the fence?
- keithcuda
- · Replies 14 ·
Is the Circular Orbit in a Multi-Electron Atom Stable?
- asdfghhjkl
- · Replies 4 ·
Spring Angular Momentum Problem
- Rmehtany
- · Replies 6 ·
Ship sails 300km from Guam, needs to reach 115km east: direction and distance?
- Lefty9602
- · Replies 7 ·
Lunar lander velocity before hitting ground
- Lefty9602
- · Replies 1 ·
Three Charges in a Triangle problem
- Panda_Doll
- · Replies 7 ·
What does "power entering the source" mean?
- LongApple
- · Replies 6 ·
Vertical distance of water inside an downward vessel
- Tulatalu
- · Replies 6 ·
2 Cubic Blocks on a Right Triangle
- postfan
- · Replies 19 ·
Determining the Angle of Velocity in Uniform Circular Motion
- Nousher Ahmed
- · Replies 2 ·
Electric potential of a cube of 8 point charges
- grantaere
- · Replies 1 ·
How Much Force Is Needed to Accelerate a Rolling Cylinder?
- jon4444
- · Replies 9 ·
Will Current Pass Through a Resistor in Parallel with a Wire?
- joel amos
- · Replies 12 ·
Voltage required for penetration of an unknown element
- grantaere
- · Replies 4 ·
Saturn's Rings: Part of the Planet or Satellites?
- postfan
- · Replies 16 ·
Coefficient of friction; rod slipping off edge of table
- Nathanael
- · Replies 21 ·
Can blowing on liquids actually cool them down?
- duran9987
- · Replies 4 ·
Why doesn't constant velocity equation apply to braking kinematics?
- postfan
- · Replies 15 ·
Finding time and velocity on two connected incline planes
- G. Coder
- · Replies 2 ·
Normal force inside a hollow cone
- squirrelschaser
- · Replies 10 ·
Finding final speed given acceleration and distance
- roinujo1
- · Replies 9 ·
Eigenvectors of exponential matrix (pauli matrix)
- Punctualchappo
- · Replies 3 ·
Rotational kinetic energy(flywheel) problem
- orangeincup
- · Replies 4 ·
Gram-Schmidt Orthonormal Functions
- Robsta
- · Replies 18 ·
Force of Friction on Boat w/ Thrust
- air-in
- · Replies 6 ·
Two indentical beads w/ mass m and charge q in hemispherical
- ortiz123
- · Replies 1 ·
How Can I Linearize a Velocity vs Force Graph in Circular Motion Analysis?
- Bryan Tran
- · Replies 6 ·
Why are velocities equal at minimum separation of two charged pucks?
- EgpYo
- · Replies 1 ·
Sending a satellite to Jupiter?
- 21joanna12
- · Replies 1 ·
Finding speed -- A child on his toboggan
- Jeanclaud
- · Replies 2 ·
Acceleration of a system due to gravity
- Sheepwall
- · Replies 6 ·
Projectile motion of cannonball fired from 45m cliff
- zesi
- · Replies 6 ·
Radioactive Decay to a Non-radioactive Isotope
- Teemo
- · Replies 2 ·
Two blocks with kinetic friction: which accelerates faster?
- arpon
- · Replies 1 ·
Trying to understand the solution given
- issacnewton
- · Replies 5 ·
Does Dumping Coal into a Moving Train Affect Its Velocity?
- Brob
- · Replies 5 ·
Photoelectric effect with retarding potential at 600 nm
- DarkKnight911
- · Replies 3 ·
Calculating Capacitance for Optimal Light-Bulb Performance
- EzequielSeattle
- · Replies 5 ·
Are you not supposed consider sig digs for mass?
- EgpYo
- · Replies 10 ·
Find the original speed of the car
- hgducharme
- · Replies 3 ·
How Can You Determine the Sun’s Absolute Magnitude?
- scoopaloop
- · Replies 2 ·
Understanding Statics Analysis for a Simple Square Truss Design
- dhume878
- · Replies 3 ·
Bullet embedded in suspended block reaches 40° angle
- StonedPhysicist
- · Replies 10 ·
Which situations involve forced frequency oscillations
- Redjakk1
- · Replies 2 ·
Free body diagrams for boxes on an inclined plank
- Misiu
- · Replies 13 ·
Calculating Power Transferred in a 2-Pulley System
- stackemup
- · Replies 9 ·
Compass Behavior Near Parallel Current-Carrying Wires
- Samurai44
- · Replies 4 ·
Velocity in a gravitational field
- PWiz
- · Replies 12 ·
Signal processing in matlab, what is signal length ?
- bert2002
- · Replies 2 ·
Aluminium covered with gold submerged into water
- Artj0m
- · Replies 50 ·
Finding tension in a string when force accelerates the mass
- PhysicStud01
- · Replies 18 ·
Momentum conservation in collision problems
- kenny243
- · Replies 4 ·
Finding work from an inclined plane, basic question
- Curious&TheNon
- · Replies 1 ·
Finding Time when given velocity, distance, and mass
- fantasy15
- · Replies 1 ·
Superposition of 3 point masses
- bravoman
- · Replies 9 ·
Ballistic Spring System Problem
- Branson Holt
- · Replies 3 ·
What is the diameter of the bicycle tire?
- keithcuda
- · Replies 5 ·
Final velocity of a ball down a ramp.
- HHH
- · Replies 6 ·
Force on a shrinking circular loop in a constant B field
- Coffee_
- · Replies 11 ·
Piece of quartz mixed with gold
- Arcany
- · Replies 16 ·
Tension in two strings supporting 2.5N weight at 30° and 40°
- rdl204
- · Replies 1 ·
Struggling to find a way to measure rotary torque
- madgorillaz15
- · Replies 8 ·
Hall voltage across a 150 μm copper tape in a 0.65 T field with 23 A current
- iverse
- · Replies 6 ·
Kinetics/Motion in 2D/Energy question
- Curious&TheNon
- · Replies 4 ·
First Year Forced Oscillator Problem
- Eugene Kelly
- · Replies 2 ·
How Should Forces Be Calculated in a Truck-Trailer System?
- MaxKempar
- · Replies 4 ·
Find Net Electric Field Between Two Point Charges
- rlc
- · Replies 4 ·
Equation of state of a rubber band
- Robsta
- · Replies 13 ·
Size of a cube for a molecule of ideal gas
- Karol
- · Replies 6 ·
Special Relativity rocket’s speed
- br0shizzle1
- · Replies 14 ·
Why does initial velocity not affect horizontal range?
- Sonny18n
- · Replies 6 ·
Reaction forces and moments for cylinder with two fixed rods
- physicsdumby
- · Replies 4 ·
Supposedly easy physics problem =( [projectile]
- akshajkadaveru
- · Replies 44 ·
Single-slit diffraction: why do I get a calculator error for the second minimum?
- Quantum Fizzics
- · Replies 2 ·
Calculating Net Force results in a final velocity
- Diego Fernandez
- · Replies 8 ·
Question on Surface Integral and Flux
- Loppyfoot
- · Replies 7 ·
Projectile launched at 30° hits target at 0.4 m horizontal distance
- akshajkadaveru
- · Replies 1 ·
What is the N2/O2 Ratio at 3255m Using Laplace's Law?
- Wolfmannm
- · Replies 1 ·
Wave Problem -- Total amplitude of fundamental and first three harmonics
- PhysicsMan999
- · Replies 4 ·
First post, Electrostatics Questions
- 123lt
- · Replies 7 ·
Determining voltage across resistor and current direction
- LongApple
- · Replies 1 ·