Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Threads
Accelerating pulley with three masses: why is the acceleration negative?
- Adriano25
- · Replies 3 ·
Circular Motion, an object attached by a string to a motor
- SDTK
- · Replies 7 ·
Bohr Model applied to Excitons
- adamaero
- · Replies 4 ·
Quick Resultant Forces Question
- Pablo1122
- · Replies 3 ·
What is the magnitude of acceleration?
- Adriano25
- · Replies 13 ·
Pendulum experiment systematic errors
- Shyanne
- · Replies 41 ·
Charges of three long charged cylinders centered on 1 axis
- Omar FTM
- · Replies 1 ·
Understanding Far Points and Lens Power in Correcting Myopia
- physics148
- · Replies 2 ·
Accounting for Angular Acceleration in a Tensioned Rod System
- dennislam
- · Replies 10 ·
Magnification formula for a Galilean telescope
- Cocoleia
- · Replies 2 ·
Why don't we have gamma ray microscopes?
- curiousmind04
- · Replies 13 ·
What is the magnitude of gravity of a pendulum that is moved
- BrandonSW
- · Replies 16 ·
How can I calculate kinetic friction?
- Rick devena
- · Replies 2 ·
Finding the magnitude of acceleration in 2D motion
- Dano1337
- · Replies 2 ·
I'm having trouble figuring out how to use the equation with G for gravity
- Arsen_2872
- · Replies 17 ·
Why does the Coriolis effect cause asymmetric erosion and wear in each hemisphere?
- jhonn96
- · Replies 7 ·
Figuring out how to approach an electrostatics questioni
- RoboNerd
- · Replies 4 ·
Vector math for a cyclist: displacement, average velocity and acceleration
- Iron_Man_123
- · Replies 1 ·
Average speed, average velocity for a road trip
- Iron_Man_123
- · Replies 2 ·
Archived Why does internal moment equal moment about point I plus Iα?
- urbano
- · Replies 1 ·
Calculating Scattered Light Intensity at Different Wavelengths
- senobim
- · Replies 1 ·
Time average of the potential energy of a planet
- Dustgil
- · Replies 1 ·
Work of external forces and electrostatic potential energy
- crick
- · Replies 3 ·
Body diagonals -- unit vector notation
- Iron_Man_123
- · Replies 5 ·
The center of a 1.00 km diameter spherical pocket of oil
- hitemup
- · Replies 4 ·
Calculating force needed to push sled down incline
- jmm5180
- · Replies 4 ·
Calculate projectile velocity shooting from a trebuchet?
- KhaiMinhVN
- · Replies 1 ·
Applying Newton's Laws, motion with constant acceleration
- Mert Kerem Yavuz
- · Replies 2 ·
Traffic shock wave physics
- Iron_Man_123
- · Replies 1 ·
Rate of change of current with time, galvanometer deflection
- moenste
- · Replies 67 ·
V required so ions passing through the region don't devitate
- moenste
- · Replies 46 ·
Calculating acceleration on level road/ when road uphill
- jmm5180
- · Replies 24 ·
Calculate the magnetic flux density
- moenste
- · Replies 31 ·
Velocity, Acceleration and Displacement time graphs.
- unknown physicist
- · Replies 30 ·
Relativistic Addition of Velocities
- ManicPIxie
- · Replies 1 ·
What is the Work Done by Several Forces?
- Adrian Pete
- · Replies 11 ·
Computing line integral ∫(A·ds) along a parabolic path
- sgholami
- · Replies 6 ·
Calculating Uncertainty for a Chain of Trig Functions
- Ryan Hardt
- · Replies 3 ·
How to find the coefficient of kinetic friction?
- audrey1203
- · Replies 2 ·
How to determine the direction of current
- Kyle Darden
- · Replies 3 ·
Mutiple choice nuclear medicine question
- Derek1997
- · Replies 9 ·
Find work given a pulley and two weights
- fishturtle1
- · Replies 6 ·
Net force from two forces using cosine and sine laws
- den388
- · Replies 18 ·
Finding angular acceleration of a rotating cylinder from four applied forces
- Xetricon
- · Replies 1 ·
Chemical thermodynamics, entropy, Maxwell relation and Z
- deeko1987
- · Replies 1 ·
What charge circulates through the coil?
- moenste
- · Replies 17 ·
Calculating magnetic force on semicircle conductor
- shirobon
- · Replies 1 ·
Proving the inverse square law for sound intensity
- Hannes
- · Replies 5 ·
Does the velocity of sound change when the source moves?
- Hamal_Arietis
- · Replies 6 ·
Image charges for planar and spherical boundaries
- Jefferson Yun
- · Replies 3 ·
What is the average launch speed?
- Angela_vaal
- · Replies 5 ·
Ball hit at 1 m height barely clearing 21 m wall 130 m away
- kubaanglin
- · Replies 5 ·
Magnetic force on a current loop above a current-carrying plane
- gaus12777
- · Replies 6 ·
Finding work by Force over Position graph
- Jrlinton
- · Replies 4 ·
Pulley system on rough surface.
- Buffu
- · Replies 8 ·
Position-dependent forces, the use of potential
- green-beans
- · Replies 2 ·
Kinda tricky inclined plane problem
- Jrlinton
- · Replies 23 ·
Finding C from a speed distribution function.
- Cantspel
- · Replies 1 ·
Finding the number of moles of an ideal gas in a capillary
- Potatochip911
- · Replies 3 ·
Measurement Uncertainty Problem in MIT OCW 8.01x
- AdrianMachin
- · Replies 7 ·
Theory in approaching Faraday law/circuit question
- RoboNerd
- · Replies 11 ·
Work done when a car accelerates from 26.5m/s to 30m/s
- Veronica_Oles
- · Replies 6 ·
Co-60 Unit Activity: Treatment Time Calculation
- sciencegeek101
- · Replies 1 ·
Bead sliding on wire with friction between points D and F
- Elliott98
- · Replies 8 ·
How far does the piston move after energy is added?
- sliperyfrog
- · Replies 13 ·
Power loss in the transmission system with a transformer
- moenste
- · Replies 4 ·
Experiment using a potentiometer
- Taniaz
- · Replies 59 ·
Block on movable wedge pulley system
- Vibhor
- · Replies 5 ·
How Does Frequency Depend on Gravity in Classical Mechanics?
- Arij
- · Replies 1 ·
Solving circular motion problem
- SnoppDoge
- · Replies 7 ·
Final velocity of a mass moving through friction
- Jrlinton
- · Replies 4 ·
Direction of rotation of a direct current motor
- highqualityscience
- · Replies 1 ·
Maximum uniform speed on a arc of a circular path ?
- Buffu
- · Replies 8 ·
Number displayed on an electric scale when an object hits it
- ChessEnthusiast
- · Replies 15 ·
Why is ax negative and ay zero for a box sliding up a 30° incline?
- alw4026
- · Replies 20 ·
Angular Momentum of Glass on a String
- bugatti79
- · Replies 2 ·
How Do You Calculate Current Density Between Coaxial Cylinders?
- RyanP
- · Replies 5 ·
Determining the specific heat capacity of water
- VegemiteJuice
- · Replies 7 ·
Why wouldn't the bulb light up in this circuit diagram?
- PhysicsNewbie321
- · Replies 8 ·
Position of Mass (Spring Mass Sytem)
- Kanashii
- · Replies 2 ·
EMF between the rim and centre of the disc
- moenste
- · Replies 22 ·
Ideal gas law, Find the Temperature of the container?
- sliperyfrog
- · Replies 9 ·
What is the electrostatic potential energy of a sphere?
- Jhoan Steven
- · Replies 1 ·
How Long Does It Take a Car to Climb a Hill with Limited Power?
- Sunbodi
- · Replies 2 ·
Will the Cars Meet During the Chase?
- ujellytek
- · Replies 4 ·
Finding angle of resultant force from two tugboats
- TomRiddle
- · Replies 3 ·
A circuit with multiple sources of voltage
- ChessEnthusiast
- · Replies 2 ·
Lifting mass with battery-powered winch at different power levels
- RyanP
- · Replies 7 ·
What is the speed of block one when block 2 has fallen h?
- Vitani11
- · Replies 5 ·
What is the Force of Kinetic Friction?
- JustynSC
- · Replies 11 ·
Why can't we use the center of mass as a pivot for torque balance?
- Asad Raza
- · Replies 19 ·
Gravitational potential energy of a tilted teeter toy
- Lis
- · Replies 8 ·
Shouldn't force pairs equal in magnitude cancel each other?
- Varun Narayanan
- · Replies 6 ·
X ray crystallography - interpreting my graph
- Old_sm0key
- · Replies 1 ·
How Does a Time-Varying Force Affect Angular Momentum in a Dual-Radius Spool?
- Yash123
- · Replies 9 ·
Hydroelectric Power Plant Efficiency Calculation
- BrainMan
- · Replies 3 ·
Finding the equilibrium distance Rsub0 using total energy.
- joemmonster
- · Replies 1 ·
Resistance in an octahedron between adjacent vertices
- Tazi
- · Replies 3 ·
Projectile motion on inclined plane
- songoku
- · Replies 3 ·
Equilibrium of a uniform bar inclined at an angle
- Taniaz
- · Replies 41 ·