Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Threads
Projectile Motion range equation
- Kingyou123
- · Replies 12 ·
Finding dq1/dt for connected spheres with changing radius
- phyvamp
- · Replies 8 ·
Finding mass, acceleration and force in five Newton's laws problems
- AveryB
- · Replies 1 ·
Maximum weight a bar and cables can hold before breaking
- Alison A.
- · Replies 33 ·
Radiation in space (Thermodynamics)
- alivedude
- · Replies 11 ·
Vector difference: 8m at 20° north of west, 6m at 80° south of east
- astrololo
- · Replies 9 ·
Why need 4th order stiffness tensor expression?
- Galbi
- · Replies 2 ·
Finding weight W in a leg traction pulley system with 38N downward force
- stunner5000pt
- · Replies 1 ·
Finding angle and altitude using distance and time?
- 353535amelia
- · Replies 2 ·
Tensions with 3 blocks on a single pulley
- PAstudent
- · Replies 3 ·
How Can I Find Displacement With Only Velocity and Angle
- noname2020x
- · Replies 11 ·
What is the lattice constant of a zincblende structure with two types of atoms?
- orangeincup
- · Replies 4 ·
Acceleration of gravity measured
- Robb
- · Replies 7 ·
What shape does water take in a spinning bucket?
- salidlove
- · Replies 9 ·
Finding rocket altitude and launch angle from flight time and landing distance
- 353535amelia
- · Replies 3 ·
Change in gravity due to oil deposit
- gtd4dq
- · Replies 1 ·
Approximate spring potential energy U(x) for small oscillations
- StationaryPanic
- · Replies 1 ·
A bullet-knot-block system with momentum
- B3NR4Y
- · Replies 11 ·
Finding Tension of a string tied to a wall
- DERC511
- · Replies 3 ·
Two cars with constant acceleration meeting
- DylanPHY
- · Replies 1 ·
Relative Velocity Problem: Finding Train Speed from Raindrop Angle
- Mr Davis 97
- · Replies 2 ·
What is the mass of the lunar lander using the PhETLunar Lander applet?
- Danya314
- · Replies 3 ·
Force due to Solar Radiation and Gravity
- Mnemonic
- · Replies 1 ·
Magnitude and angle of A - B + C with three vectors
- iadg87
- · Replies 1 ·
Theoretical frictional force of a mass going down a ramp
- Marvels
- · Replies 3 ·
Maximum extension of a spring on an inclined plane
- Better WOrld
- · Replies 6 ·
What is the force exerted by a falling chain on a table?
- Jordan&physics
- · Replies 2 ·
How fast does the Earth need to move to provide centripital acceleration
- Makonia
- · Replies 43 ·
How can I calculate the cooling time for a ball of iron?
- alivedude
- · Replies 3 ·
A horizontal force of 100 N is applied a block solve this
- wein7145
- · Replies 3 ·
Motion w/ Constant Acceleration
- lawsonj
- · Replies 9 ·
Pulleys - Relationship between mass and aceleration
- AlonsoDeMaria
- · Replies 6 ·
Finding B_y when A−B is parallel to the x-axis
- Euler2718
- · Replies 14 ·
Velocity x' as a function of x, subject to a force function
- danmel413
- · Replies 1 ·
Calculating Speed of Sound in Nickel using Atomic Properties
- jhyrman
- · Replies 5 ·
Oblique collision of two bodies undergoing projectile motion
- Sujith Sizon
- · Replies 13 ·
Potential Gradient [Question(s) regarding the concept]
- Antonius
- · Replies 17 ·
Dimensional Analysis in Halliday/Resnick
- Blargian
- · Replies 3 ·
Tension between two objects moving at constant velocity
- moenste
- · Replies 3 ·
Modern physics: Atomic Structure
- ira
- · Replies 3 ·
How Can Julie Determine Her Average Speed on Her Return Trip?
- lawsonj
- · Replies 4 ·
How to find the equivalent resistance?
- haha1234
- · Replies 6 ·
Velocity and tension for 100g block swinging on 50cm wire
- Kernul
- · Replies 10 ·
Force needed to support Suspension of a Vehicle
- Alison A.
- · Replies 1 ·
Understanding why change in Kinetic Energy is 0
- Better WOrld
- · Replies 4 ·
How long will it take for the baseball to reach John again if he misses it?
- khzak1
- · Replies 6 ·
Finding resultant force from Fx and Fy components
- goldfish9776
- · Replies 15 ·
How Do You Calculate the Angular Speed of a Rod?
- Vibhor
- · Replies 5 ·
What Is the Final Velocity of a Projectile on an Elevated Green?
- Mr Davis 97
- · Replies 8 ·
Finding the coordinate of a point by Law of Cosines/Sines
- Alison A.
- · Replies 28 ·
Series of True or False questions related to Forces and FBDs
- Letra
- · Replies 2 ·
How Long Is the Delay for a Signal Traveling via Two Geostationary Satellites?
- JasonR2
- · Replies 1 ·
Solving for Force Q to Achieve Equilibrium for 2 Rods Connected by a Wire
- MechTech
- · Replies 1 ·
Find Initial Velocity - Projectile Motion
- Calaereth
- · Replies 18 ·
Why when traveling a curved path does acceleration go inwards?
- proto3210
- · Replies 1 ·
The flux through the hemispherical surface
- gracy
- · Replies 38 ·
How much water remains as ice when wet clothing is dried in dry wind at 0°C?
- irhum31
- · Replies 9 ·
Frames of reference and vectors problem
- notsoclever
- · Replies 4 ·
Is Work Always Positive in Linear and Rotational Cases?
- inv
- · Replies 1 ·
Kinematics -- Projectile motion problem
- MARK 42
- · Replies 11 ·
Finding current through 5 ohm resistor in mixed series-parallel circuit
- terryds
- · Replies 9 ·
Circular arcs on net electric field
- Anon.ilbe
- · Replies 9 ·
Calculate the work (Thermodynamics)
- alivedude
- · Replies 11 ·
Potential energy in a physical pendulum
- Quadrat
- · Replies 5 ·
How Far Will the Cart Travel at Increased Speeds?
- Scholar1
- · Replies 33 ·
Finding the correct root when solving for time with the quadratic formula
- khzak1
- · Replies 6 ·
Maximum depth of tank before plastic window fails from water pressure
- Wyoming Physics
- · Replies 18 ·
Gauss's law:E vs r graph (two cases of shell)
- gracy
- · Replies 3 ·
Why is the open end of a tube a node for a standing wave?
- kostoglotov
- · Replies 1 ·
How Do You Calculate Net Electric Flux Through a Cube?
- Kurtis McIntosh
- · Replies 1 ·
Solving for Object Collisions and Velocity with Displacement Formula
- Chatito
- · Replies 3 ·
Why is the direction of M_0 (r x F) out of the paper?
- goldfish9776
- · Replies 3 ·
Electric Potential and velocity
- Ryan060
- · Replies 3 ·
Setting up systems of forces and free body diagrams
- whitejac
- · Replies 1 ·
How Long Would the Sun Last if it Burned Like a Quasar?
- Jimmy87
- · Replies 5 ·
Speed and direction of a travelling wave
- sarvensogo
- · Replies 1 ·
Experimental Uncertainty - uncertainty in impact position
- DanielleG
- · Replies 2 ·
True/false questions on weight, mass, and apparent weight
- DanielleG
- · Replies 11 ·
Chair pushed on carpet: finding acceleration and normal force
- cag805
- · Replies 5 ·
Elastic collisions of particles
- accountdracula
- · Replies 5 ·
Determining the ratio of volumes
- 1729
- · Replies 7 ·
Electric flux through the square
- gracy
- · Replies 2 ·
Why do objects of different masses accelerate equally in free fall?
- LeHotDoge
- · Replies 7 ·
Are the number of electrons on both sides of the radioactive decay balanced?
- Viswanathan
- · Replies 10 ·
Conservation of energy for a system
- Arka420
- · Replies 6 ·
Trouble with a basic fluid force problem
- Wyoming Physics
- · Replies 3 ·
How to find effective resistance in a circuit.
- Aceix
- · Replies 5 ·
Evaluate Magnitude of Gravitation at the Surface of a Planet
- ScrubTier
- · Replies 20 ·
Electric Field Strength Question
- 123ryoma12
- · Replies 1 ·
How to Calculate Rowing Speed and Direction to Reach a Boathouse?
- ECard
- · Replies 1 ·
Electric flux calculatio in case of a cube
- gracy
- · Replies 13 ·
Finding the distance b that maximizes x-component of Coulomb force
- Physics2341313
- · Replies 11 ·
How Long Does It Take for a Rocket to Return After Stopping Its Initial Ascent?
- Physicsnoob90
- · Replies 1 ·
Calculating the De Broglie Wavelength of an Accelerated Particle
- Safinaz
- · Replies 4 ·
Determining the Net Force on a Wedge and Block System
- PAstudent
- · Replies 1 ·
[Statics - Torques] Determining Coefficient of Static Friction
- erickbq
- · Replies 1 ·
Finding mass of an object being pulled on a slope
- NostNagalfar
- · Replies 9 ·
Finding mass using charges and accerleration
- Ryan060
- · Replies 3 ·
Electric Forces with particles and Columbs law problem.
- Toon
- · Replies 5 ·
Electric Potential in an Insulating Sphere
- h2obc33
- · Replies 1 ·