Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Threads
What is the correct way to solve for weight on two pulleys?
- Addez123
- · Replies 10 ·
Speeding bullet, average force by post on bullet
- serendipityfox
- · Replies 10 ·
What is the coefficient of friction for a pen rolling down a book?
- cs44167
- · Replies 3 ·
Parallel Plate Capacitance and Charge Time
- HelloCthulhu
- · Replies 7 ·
Finding the period of a pendulum in motion along a curve
- Like Tony Stark
- · Replies 8 ·
Circuit Q Basics: Understand Electrical Circuits
- User1265
- · Replies 5 ·
Deformation of a spring being accelerated
- Like Tony Stark
- · Replies 6 ·
How Is pV = 1/3 Nmc^2 Derived in Kinetic Theory?
- etotheipi
- · Replies 2 ·
Block and cylinder with constant velocity in non-inertial frame
- Like Tony Stark
- · Replies 7 ·
Prove that a mass has simple harmonic motion
- Like Tony Stark
- · Replies 8 ·
Finding the third vector when two vectors sum to a resultant
- Alexandra Fabiello
- · Replies 7 ·
Rewriting the Ampere's law in term of free currents only
- Riemann9471
- · Replies 2 ·
Using Y to Delta Transformation to Find Currents
- rugerts
- · Replies 6 ·
Why is the change in entropy of a heat pump in one cycle equal to zero?
- yecko
- · Replies 18 ·
Change in the energy content of an isobaric process
- diaaa2
- · Replies 2 ·
How Do Coriolis and Centrifugal Forces Affect Train Motion?
- Like Tony Stark
- · Replies 5 ·
How can I input formulas and images on Physics Forums?
- Overberg
- · Replies 2 ·
Finding when two accelerating objects meet with different accelerations
- StephanieSamperio
- · Replies 10 ·
Deriving an equation for theta via the Projectile Motion Trajectory Eq
- lightlightsup
- · Replies 3 ·
Is the Calculation of Spring Deformation in an Accelerating Room Correct?
- Like Tony Stark
- · Replies 11 ·
Antenna radiation pattern with phase difference and spacing
- PhDeezNutz
- · Replies 7 ·
What is the relationship between Helium's atomic mass and the Rydberg constant?
- MaestroBach
- · Replies 1 ·
Static Friction in Circular Motion
- Softwarm
- · Replies 3 ·
Work and energy of an object on a ice slope
- ac7597
- · Replies 7 ·
Dielectric interface plate capacitor at angle alpha
- lena_2509
- · Replies 1 ·
Work of a object moving across surfaces with different friction
- ac7597
- · Replies 3 ·
How can we find the center of mass of a solid cone?
- Nimarjeet Bajwa
- · Replies 3 ·
Why does a plane mirror need to be half your height to see yourself fully?
- User1265
- · Replies 14 ·
Show that the flywheel inside the train counteracts lean in a curve
- Karl Karlsson
- · Replies 4 ·
Blocks in a room which is being accelerated
- Like Tony Stark
- · Replies 1 ·
Convert J/mol k into atm cm^3/mol k
- Mr-Thirty
- · Replies 6 ·
Work of gravity on an object sliding down a frictionless sphere
- ac7597
- · Replies 12 ·
Why do I feel centrifugal acceleration when standing on a revolving ball?
- Like Tony Stark
- · Replies 1 ·
Finding angular velocity for a rope to be cut
- Like Tony Stark
- · Replies 1 ·
Is the Normal Force on m2 Affected by Vertical Acceleration in Different Cases?
- Like Tony Stark
- · Replies 1 ·
Radiation Q: C Answr w/1cm Alum Plate?
- User1265
- · Replies 1 ·
Checking vector force problem solutions
- samstim
- · Replies 3 ·
Find the E-Field between plates when given only given part of the total voltage
- mhrob24
- · Replies 19 ·
Finding initial velocity when given only mass and distance
- jessie763
- · Replies 2 ·
Parallel circuit with internal resistance
- dbag123
- · Replies 6 ·
How much force do I exert on the Earth?
- cs44167
- · Replies 6 ·
"Tension: T1 vs T2 - What is Correct?
- physicswizard93
- · Replies 1 ·
Calculate the amount of charge in Amp*seconds
- dbag123
- · Replies 2 ·
Finding the acceleration of a pulley system including an inclined plane
- Majd64
- · Replies 2 ·
Find the electric field inside and outside of a spherical shell superposition
- Davidllerenav
- · Replies 12 ·
Find the angle so that it seems that Mars is approaching to you
- Like Tony Stark
- · Replies 3 ·
What is the magnitude of resultant force on a car on a banked curve?
- brsclownC
- · Replies 2 ·
Understanding Pseudo-Forces in Non-Inertial Frames
- Like Tony Stark
- · Replies 10 ·
Calculating constant of elasticity of springs in a car
- Like Tony Stark
- · Replies 1 ·
Rotating cylinder rolling without slipping in a B field
- jisbon
- · Replies 9 ·
Finding heights in terms of angle for a mass-pulley system
- smashueatu
- · Replies 11 ·
Acceleration acting on a block lying on a wedge (non-inertial frame)
- Like Tony Stark
- · Replies 3 ·
Tension in the string while it descends
- Asterast
- · Replies 8 ·
Temperature change brought about by radiation
- Sai Maurice
- · Replies 23 ·
Sink time of a cap with varying hole diameters
- Jefffff
- · Replies 21 ·
How to Solve Acceleration of Cart on 3 Different Slopes?
- LilRubyKinz
- · Replies 10 ·
Atwood System - max. height of the lighter object
- laurs
- · Replies 3 ·
Determine when (m), and how long the rocket should fire.
- pnstu
- · Replies 2 ·
Rotating a given vector about an axis
- brotherbobby
- · Replies 4 ·
Finding the angular velocity of a rotating arm
- Like Tony Stark
- · Replies 5 ·
Calculate the Heat Loss in a Hot Water Tank from a Shower
- Howlin
- · Replies 2 ·
Calculating the torque of the Laplace force on this coil
- merdeka
- · Replies 3 ·
Determine the potential energy function of the charged particle
- SLTH02
- · Replies 4 ·
What are the spatial dimensions of the plot?
- gabriellelee
- · Replies 1 ·
Finding the Thevenin equivalent by zeroing
- Jelsborg
- · Replies 6 ·
Finding the displacement of an electron between 2 charged rods
- jisbon
- · Replies 11 ·
Total work of a directional wind on a mailman
- ac7597
- · Replies 5 ·
What is the energy released by Tritium when it decays?
- SebastianRM
- · Replies 5 ·
Finding distance east given west dist., velocities, and average velocity
- Alexandra Fabiello
- · Replies 3 ·
Baseball player projectile motion with initial height
- Michael_0039
- · Replies 3 ·
Understanding Sum to Infinity in Geometric Progression
- Sarah0001
- · Replies 2 ·
Springs in series affecting the uncertainty
- edwan001
- · Replies 1 ·
How can air density be accurately calculated at different altitudes?
- Addez123
- · Replies 8 ·
How do I solve this physics problem of mechanics and Newton's laws?
- mayalevy2
- · Replies 2 ·
Kinetic friction coefficient calculation gives 0.45 instead of 0.37
- Addez123
- · Replies 5 ·
Correct statement about coils moving in and out of a magnetic field
- songoku
- · Replies 12 ·
Using Current and Voltage Dividers
- rugerts
- · Replies 3 ·
Electric energy density in the dielectric of a coaxial cable
- adamaero
- · Replies 2 ·
Work required to attach the bowstring to the bow?
- SLTH02
- · Replies 6 ·
Measuring position and velocity from a non inertial reference frame
- Like Tony Stark
- · Replies 9 ·
Correct statement about gravitational force, field and potential
- songoku
- · Replies 12 ·
Prove that “leading clocks lag”
- alexmahone
- · Replies 8 ·
Acceleration and tension of a block on an inclined plane
- Like Tony Stark
- · Replies 10 ·
Calculate internal temperature and energy changes
- Pochen Liu
- · Replies 1 ·
Rounding of Final Value with Sig Figs
- Browntown
- · Replies 5 ·
Body connected to two parts of a rope on an inclined plane
- Like Tony Stark
- · Replies 4 ·
Gravitation attraction of a mountain
- ac7597
- · Replies 16 ·
Find the tensions acting in different ropes that conect three bodies
- Like Tony Stark
- · Replies 11 ·
Two cells in series with internal resistors -- calculate the current
- lalallaland
- · Replies 7 ·
Find the attractive force of gravity between two objects
- ac7597
- · Replies 8 ·
Understanding a Homopolar Generator
- jisbon
- · Replies 2 ·
Using Newton's Laws: Friction, Circular Motion, Drag Forces
- Sunwoo Bae
- · Replies 1 ·
Unit vector notation, why use 3 letters for a component?
- lboulden
- · Replies 2 ·
Identifying Serial and Parallel Connections
- rugerts
- · Replies 9 ·
What Is the Variation of Force With Respect to Radius in Circular Orbit?
- Samsmith47
- · Replies 5 ·
Mastering Motion on a Plane: Solving the Defiance Drake Question
- CJoy
- · Replies 1 ·
Phase difference between two points
- songoku
- · Replies 6 ·
Finding angular velocity when the CM is directly below the pivot
- jisbon
- · Replies 15 ·
Which force acts perpendicular to the side faces of an axe head?
- NathanRB
- · Replies 6 ·
Conceptual understanding/question of guass and Coulomb’s law
- Tryingtolearn123
- · Replies 5 ·