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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Why is direction ignored when calculating potential energy change but not for force?
- Angela Liang
- · Replies 5 ·
Question regarding Coulomb's Law
- Keshav Santhanam
- · Replies 8 ·
How Does a Magnetic Field Affect a Wire Carrying Current?
- Physics345
- · Replies 2 ·
When is an Electric Field eqn set as - or + ?
- PerpetuallyConfused
- · Replies 3 ·
How to do electrical conductivity tests?
- Cheesycheese213
- · Replies 1 ·
Absorbed dose given an initial dose rate
- superduke1200
- · Replies 13 ·
Potential of hollow open ended cylinder
- FS98
- · Replies 1 ·
Which side of a resistor is positive/negative?
- miyayeah
- · Replies 1 ·
How Do You Calculate the Electric Potential of a Charged Cylinder?
- FS98
- · Replies 4 ·
Find the maximum length of x that will maintain equilibrium
- Richie Smash
- · Replies 66 ·
Error calculation for µ in standing wave experiment
- rasalzari
- · Replies 1 ·
Potential at the center of a sphere between two long rods
- FS98
- · Replies 3 ·
Can You Solve Graphical Vector Problems Using Only Math and Integration?
- isukatphysics69
- · Replies 2 ·
Why is the area of infinite small annulus 2πr dr?
- bolzano95
- · Replies 3 ·
Physics involved in an egg-drop project
- Yellowkies_3275
- · Replies 18 ·
Rank the vertical component of velocities at the landing points
- isukatphysics69
- · Replies 7 ·
Find acceleration and centripetal force
- isukatphysics69
- · Replies 4 ·
Rank the rate of speed changing of object?
- isukatphysics69
- · Replies 25 ·
Extrema of electrical potential
- FS98
- · Replies 5 ·
What is the direction of the current in the given image?
- Coderhk
- · Replies 18 ·
Finding acceleration and normal force in an elevator with three passengers
- Meeeessttteeehh
- · Replies 9 ·
Location of electrons and protons
- Hydrous Caperilla
- · Replies 1 ·
Minimum force to separate two oppositely-charged ions
- Shomari
- · Replies 8 ·
Electric potential at an unknown point
- miyayeah
- · Replies 2 ·
Plotting electric potential for two point charges along a line
- FS98
- · Replies 12 ·
Effect of rotating two polarizing films on transmitted light
- Physics345
- · Replies 10 ·
Kinetic Energy Equations in MS Excel
- Makali
- · Replies 3 ·
How to find vectors and bisectors of an electric field
- SirChris93
- · Replies 9 ·
How to find unknown refractive index to solve for theta
- Richie Smash
- · Replies 11 ·
Two balls thrown vertically from building heights meeting after 2 seconds
- yaniv arazi
- · Replies 9 ·
Find Initial Velocity Given Height, Range, and Initial Angle
- vcm1992
- · Replies 4 ·
Understanding PhET simulation (Faraday's law)
- sohjau
- · Replies 7 ·
Calculate the initial acceleration of this pulley system
- Phantoful
- · Replies 8 ·
Find final velocity in a horizontal projectile motion
- vAhmed
- · Replies 2 ·
Rank velocities of projectiles at landing?
- isukatphysics69
- · Replies 4 ·
Rank the vertical component of velocity?
- isukatphysics69
- · Replies 3 ·
The magnetic flux density at point P between parallel wires
- whatdoido
- · Replies 2 ·
Relation between power factor and phase angle
- Vriska
- · Replies 4 ·
Why does maximum force occur when a block is on the verge of slipping?
- appliedF
- · Replies 1 ·
Why do electrons collide with ions in a conductor
- Genji Shimada
- · Replies 2 ·
How Much Work is Done by Gravity?
- x2017
- · Replies 7 ·
Why do different current directions in nodal analysis give different answers?
- mgmt113
- · Replies 7 ·
What is the speed of block as it reaches O from point P
- Richie Smash
- · Replies 10 ·
Three parallel plates -- find the electric field
- ln(
- · Replies 9 ·
Calculating mass of a planet (Law of Universal Gravitation)
- Humbleness
- · Replies 2 ·
Number of Photons inside a Laser Cavity
- HuskyLab
- · Replies 5 ·
Thermal Neutron Absorption Rate in Water?
- bran_1
- · Replies 5 ·
How Can You Calculate Mass from Force if Acceleration is Zero?
- TheOGBacon
- · Replies 4 ·
Rubber strings pulled and realeased -- find the max height
- Helly123
- · Replies 19 ·
Objects with Different Moments of Inertia Rolling Down an Inclined Plane
- lc99
- · Replies 5 ·
Young's double slit experiment with two sets of slits
- Apashanka das
- · Replies 4 ·
Optimal Trajectory Angle for Maximum Area?
- Phantoful
- · Replies 10 ·
Why doesn't the hanging block have a spring force in the pulley system?
- Abhimessi10
- · Replies 14 ·
Bird flying to nest in crosswind at 90 km/h
- Jas
- · Replies 2 ·
Confirmation of a net force calculation from a diagram
- Humbleness
- · Replies 9 ·
What Is the Speed of the Man Relative to the Ground?
- Captain Levi
- · Replies 11 ·
Work to move electron/proton between the plates of a charged capacitor?
- JustAStudent
- · Replies 22 ·
Moment of Inertia in Planet System
- lc99
- · Replies 9 ·
What direction must a force point to spin up a wheel clockwise?
- lc99
- · Replies 11 ·
Calculating Orbital Speed Using Conservation of Angular Momentum
- lc99
- · Replies 2 ·
Finding the internal resistance of battery
- rmiller70015
- · Replies 10 ·
Current in circuit with many resistors
- miyayeah
- · Replies 6 ·
Calculating the net force acting on an object from a diagram
- Humbleness
- · Replies 9 ·
Finding the electric field from a line charge integral
- Jayalk97
- · Replies 13 ·
Finding minimum and maximum intensity of waves
- Troi Jones
- · Replies 9 ·
How Do You Model Free Fall with Air Resistance in Differential Equations?
- Albert86
- · Replies 7 ·
Why don't units have match for specific heat and mass
- Perseverence
- · Replies 21 ·
NBr3: Polar or Nonpolar Molecule?
- reese houseknecht
- · Replies 1 ·
Intensity for Young’s Double Slit Interference
- Aprtaenl
- · Replies 9 ·
Optimal Velocity for Projectile Path over a Sloped Roof
- timetraveller123
- · Replies 22 ·
Ball hitting baseball bat (with no impulse)
- SnappySeudonym
- · Replies 1 ·
Set up the Lagrangian for a CO2 molecule
- FilipLand
- · Replies 6 ·
Basic Newton's Rings Numerical Problem
- sayansh
- · Replies 4 ·
Ratio of friction forces on two balls at different radii on a rotating disk
- lc99
- · Replies 5 ·
Finding launch angle from vertical and horizontal distance
- vetgirl1990
- · Replies 5 ·
Infinite wire -- Magnetic field from a current in a long L-shaped wire
- Hubbles
- · Replies 3 ·
Calculating uncertainty for a small sample
- Taylor_1989
- · Replies 14 ·
Wind Turbine Energy Transformations
- Physics345
- · Replies 10 ·
Electric Field from Long Hollow Cylinder
- FS98
- · Replies 3 ·
Acceleration of proton near helium nucleus using Coulomb's law
- neelu
- · Replies 1 ·
How to Derive Power for a Drone Hovering Using a Capacitor?
- Chris Johns
- · Replies 3 ·
What is the volume of a block of silver that weighs 107 N
- Alex Beltran
- · Replies 2 ·
Finding accelerations in a pulley system with dependent motion
- Oklid
- · Replies 10 ·
Distribution of ions in a cylindrical container
- Mat15
- · Replies 5 ·
Ladybug on turntable slipping at 0.5 m/s: finding coefficient of friction without radius
- almosthavoc
- · Replies 15 ·
Volume of smaller pyramid is less than the volume of the whole.
- R_moor
- · Replies 5 ·
Why can Nature can be modeled with only the 1st and 2nd derivatives?
- morenopo2012
- · Replies 2 ·
Does energy conservation sum rotational and translational kinetic energy?
- lc99
- · Replies 5 ·
Finding Velocity of Golf Club After Impact with Ball
- x2017
- · Replies 14 ·
Relation of Charge polarity and voltage polarity
- KKJ20
- · Replies 5 ·
What variables affect the height of a Heron's fountain?
- Dami121
- · Replies 74 ·
Why is force P not included for body CD in this statics problem?
- yecko
- · Replies 1 ·
FInding current in parallel and series circuits
- rocky4920
- · Replies 10 ·
What is the relationship between kinetic energy and gravitational acceleration?
- Makali
- · Replies 7 ·
Current Flowing through High Voltage AC Transmission Lines
- Dave Johnson
- · Replies 8 ·
Medical supplies dropped from a plane (projectile motion)
- Humbleness
- · Replies 4 ·
How to Solve a Timing Diagram with Multiple Logic Gates?
- Potatochip911
- · Replies 3 ·
Charged sphere on horizontal thread and above charged plate
- Matthew Muro
- · Replies 5 ·
Elastic and inelstic collisions conceptual questions.
- R_moor
- · Replies 6 ·