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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How to use the completeness relation
- Sergio Rodriguez
- · Replies 4 ·
Using the angular momentum principle for 2 pucks
- shepherd882
- · Replies 3 ·
Moment of inertia of door rotation
- sp3sp2sp
- · Replies 1 ·
Why is resistance of similar cases calculated differently?
- Shivang kohlii
- · Replies 4 ·
Moment of inertia about a perpendicular axis through its center?
- sp3sp2sp
- · Replies 5 ·
Object A is stationary while objects B and C are in motion.
- Cc518
- · Replies 12 ·
How Does Elevator Physics Affect the Work Done by a Cable?
- titansarus
- · Replies 2 ·
Finding the Work of a spring and friction with a changing angle
- titansarus
- · Replies 21 ·
Rocket thruster force and momentum in vector form
- bushabean
- · Replies 2 ·
Time of Fall in triangular and rectangular frame
- titansarus
- · Replies 10 ·
Conservation of momentum in two dimensions
- keroberous
- · Replies 4 ·
Buouyancy force and Archimedes' principle
- lin1430
- · Replies 5 ·
Problem about electromagnetic waves -- Writing equations for B(t) and E(t)
- Bernat Pinos
- · Replies 2 ·
Current through capacitors in parallel
- Krushnaraj Pandya
- · Replies 24 ·
How Do You Solve Mesh Analysis with Multiple Loops and Controlled Sources?
- Ronaldo95163
- · Replies 2 ·
Forces - Space Shuttle Takeoff Calculations
- Taylan
- · Replies 22 ·
How Do the Temperatures of Star 1 and Star 2 Compare?
- DracoMalfoy
- · Replies 2 ·
Ratio of the length of resistive wires in a square
- Krushnaraj Pandya
- · Replies 4 ·
Rank the four objects from fastest to slowest
- JessicaHelena
- · Replies 3 ·
Surface Tension, find number of stitches to be made
- Ishraq Begum
- · Replies 11 ·
Orbital speed of an object in a circular orbit
- Natchanon
- · Replies 1 ·
Voltmeter readings across a closed/open switch in circuits
- Krushnaraj Pandya
- · Replies 10 ·
Energy in capacitor at steady state
- Krushnaraj Pandya
- · Replies 10 ·
Pumpkin explodes into 3 pieces—find the third's mass, speed and direction
- Forerunner546
- · Replies 8 ·
Solid sphere rolling along a track
- JessicaHelena
- · Replies 3 ·
Energy removed from 1.5 kg liquid copper cooling to solid
- DracoMalfoy
- · Replies 15 ·
Finding the tension of two cables holding an object at rest
- WOLFY302
- · Replies 7 ·
Equation that relates gravity and period
- IHaveAQhestion
- · Replies 4 ·
Elliptically polarized light incident at Brewster's angle
- Alex Pedersen
- · Replies 1 ·
Center of percussion of a baseball bat
- CricK0es
- · Replies 10 ·
Rate of Energy Transferred, Aluminum Pot
- DracoMalfoy
- · Replies 5 ·
RC circuit - Rate o'energy dissipated = rate o'energy stored
- bornofflame
- · Replies 8 ·
How to calculate rebound speed of ball hitting a wall?
- MattDutra123
- · Replies 4 ·
Two moving objects - box and cart
- titansarus
- · Replies 3 ·
Solid Disk Pulley + 2 Mass system, v derivation using 2 methods
- Dorian
- · Replies 12 ·
How to find the acceleration due to gravity inside a planet?
- Johnnie123
- · Replies 3 ·
Solving Symbolically: Height of Cliff with No Air Resistance
- SavannahN
- · Replies 1 ·
Moving Down a Ramp: Answers & Explanations
- JessicaHelena
- · Replies 8 ·
What Forces Contribute to the Torque on a Moving Robot?
- Granger
- · Replies 1 ·
Change in momentum when given the speed (not the velocity).
- MattDutra123
- · Replies 2 ·
'Force on pulley by a string' conception
- Oklid
- · Replies 29 ·
Do A and C have same or different KE at the end?
- JessicaHelena
- · Replies 3 ·
Bus traveling at constant speed on a 6.0° incline
- melovephysics
- · Replies 7 ·
Given an acceleration figure calculate speed and distance
- Alexanddros81
- · Replies 1 ·
Do I need to consider mass in the equations?
- SavannahN
- · Replies 3 ·
Field dependence on the potential in a wire
- Krushnaraj Pandya
- · Replies 10 ·
Speed of a disc after a collision
- Pochen Liu
- · Replies 2 ·
Electrical Conductor is in relation to heat transfer
- Dreebs
- · Replies 6 ·
Center of mass and rotation question
- sp3sp2sp
- · Replies 4 ·
Finding the Torque on a Fixed Square
- JClay813
- · Replies 7 ·
Applying Ampere's Law to a Transformer
- Master1022
- · Replies 5 ·
Why is aerogel used as an insulating material in skylights?
- felipe douglas
- · Replies 6 ·
Why does condensing water vapor improve furnace efficiency?
- felipe douglas
- · Replies 1 ·
Vis-viva equation predicting periapsis distance in two-body problem
- Philip Robotic
- · Replies 6 ·
How to build an energy-efficient house
- felipe douglas
- · Replies 3 ·
The components of force and velocity vectors in circular motion
- PainterGuy
- · Replies 11 ·
What is the correct way to find the temperature of helium in this scenario?
- Angelina21
- · Replies 2 ·
What velocity does a train need to go up and down the hill
- Jorgen1224
- · Replies 37 ·
Work done pulling a cart over a pulley with angle parameterization
- titansarus
- · Replies 4 ·
Initial displacement of a midpoint of a string?
- Howard Fox
- · Replies 1 ·
White Roof Vs. Black Roof on a house
- Dreebs
- · Replies 1 ·
Potential energy lost when rubber ball drops and bounces back
- Lucyc2008
- · Replies 1 ·
Which wingtip will be positive when airplane flies?
- songoku
- · Replies 7 ·
How Do Ceiling Fans Enhance Winter Heating Efficiency?
- Dreebs
- · Replies 1 ·
How to Find y in a Double Slit Experiment Without Intensity Values?
- zehkari
- · Replies 7 ·
When is attic insulation most important for heat flow?
- Dreebs
- · Replies 1 ·
Block with 20N force: why is my kinetic energy calculation wrong?
- sp3sp2sp
- · Replies 13 ·
Mean Frequency and Frequency Spread of a Laser Pulse
- CDL
- · Replies 3 ·
A typical monthly utility rate / Current and resistance
- johann1301h
- · Replies 11 ·
A bullet has been shot from a moving car
- Akash47
- · Replies 1 ·
Work-energy v.s. impulse-momentum bar charts
- otownsend
- · Replies 9 ·
Mechanics problem with two masses, a pulley and friction
- Ahmed Ayman
- · Replies 23 ·
Transverse acceleration in polar coordinates
- marksyncm
- · Replies 3 ·
Creating a solution for all the answer choices
- eri139
- · Replies 8 ·
Geometric optics: Thin lense equation
- Beth N
- · Replies 3 ·
Calculate the mass of a star and a planet that orbits it
- shk
- · Replies 12 ·
Pair Production: Which Conservation Law?
- The Head
- · Replies 2 ·
Calculating tensions and acceleration
- shepherd882
- · Replies 10 ·
Finding the magnetic field at a point
- subhradeep mahata
- · Replies 12 ·
Gravitational Potential Energy questions near the surface of a planet
- shk
- · Replies 8 ·
What is the net acceleration of the coin on a rotating disk?
- ComputerForests000
- · Replies 2 ·
EMF and potential in a circuit
- Krushnaraj Pandya
- · Replies 2 ·
Does average power equal the product of average voltage and current?
- Master1022
- · Replies 3 ·
Where between the Moon and the Earth is the gravitational potential=0 ?
- shk
- · Replies 21 ·
Determining the height an arrow reaches when shot from a bow
- otownsend
- · Replies 7 ·
Powering an LED via Induced Current
- rugerts
- · Replies 10 ·
Why add 3 instead of dividing by 3 in composite function
- Natasha1
- · Replies 8 ·
Compression of a spring by an object in free fall
- hawkeye1029
- · Replies 8 ·
Where Do Balls Collide When Dropped and Thrown Up Simultaneously?
- Fede Aguilera
- · Replies 17 ·
Tension in two ropes holding a board
- Mark Taylor
- · Replies 2 ·
Does preferential transmission in thin-film interference mean 100% transmission?
- Beth N
- · Replies 6 ·
Expressing angular momentum in terms of velocity for a rigid body
- Cedric Chia
- · Replies 3 ·
Retarding force when 50kg object falls 4m onto 6kg object
- Taidhg
- · Replies 10 ·
Why does a longer stick fall over slower than a shorter one?
- GoCubs12
- · Replies 3 ·
Calculating spring constant of a spring loaded cannon
- alphaQ
- · Replies 7 ·
Determine if a car can pop a wheelie?
- bbbl67
- · Replies 15 ·
Infinite time for an object to get K=0 conservative Force
- titansarus
- · Replies 10 ·
Maximum speed and magnitude of the acceleration of a spring?
- Howard Fox
- · Replies 4 ·
Nature of charge at the junction of a composite wire
- Aishikdesto
- · Replies 12 ·
Final velocities of two objects in a 2D elastic collision
- Protium_H1
- · Replies 3 ·