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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Projectile Motion with Air Drag
- trumanf_
- · Replies 3 ·
Entropy change when melting ice then refreezing the water
- yamata1
- · Replies 8 ·
Polynomial fitting for projectile motion with air resistance
- cookiemnstr510510
- · Replies 7 ·
Work or Net Work when calculating Power?
- brawler234
- · Replies 5 ·
Meteorology Physics: Apparent wind problem
- Sofina
- · Replies 3 ·
Projectile returns to initial speed after 2 seconds
- wicker558
- · Replies 16 ·
To find the amplitude of a mass on an elastic string
- gnits
- · Replies 7 ·
How to Solve Hinge Force Problems?
- mmaismma
- · Replies 20 ·
Solving 2 Blocks on a Spring: Ma = Kx
- eri139
- · Replies 3 ·
Maximum compression of a spring?
- eri139
- · Replies 2 ·
A cart with two cylindrical wheels connected by a rod
- physics_CD
- · Replies 8 ·
Motion of 2 masses connected by a rod to a pendulum
- Jenny Physics
- · Replies 5 ·
Special relativity problems — More details below
- billllib
- · Replies 6 ·
Putting a slab of some material just after the slits in Young's model
- Adesh
- · Replies 14 ·
Self-propelled car by launching projectile backward
- Roberta314
- · Replies 16 ·
Determining the factors impacting the amount of Work done
- BiggestAfrica
- · Replies 3 ·
What Forces Act on a Block in a Rotating Cylinder?
- fedecolo
- · Replies 47 ·
Energy Conservation of a Vertical Spring
- Physicsboi123
- · Replies 5 ·
Why Does My Calculation of Maxwellian Gas Velocity Yield an Incorrect Result?
- Saptarshi Sarkar
- · Replies 7 ·
Finding the angle between a wall and a broken rope
- bolzano95
- · Replies 1 ·
Is 2D Conservation of Momentum Possible? A Visual Analysis
- Saptarshi Sarkar
- · Replies 7 ·
Temperature change in a gas expansion
- yamata1
- · Replies 10 ·
Equation of motion of a simple pendulum
- JD_PM
- · Replies 6 ·
Has this particle exceeded 30 km/h on a velocity vs. time graph?
- computing
- · Replies 3 ·
Instantaneous acceleration of blocks
- Tanya Sharma
- · Replies 13 ·
RMS velocity of molecules in a mixture
- Saptarshi Sarkar
- · Replies 7 ·
Mechanics problem — One body thrown vertically and one thrown horizontally
- Baiatul122001
- · Replies 35 ·
Finding internal energy change, work and heat with ideal gas law
- zvwner
- · Replies 10 ·
Change in the time period of a pendulum
- Prabs3257
- · Replies 1 ·
Work done by applied force vs net force on a moving box
- brawler234
- · Replies 25 ·
Force needed to push water with connected pistons of different areas
- vxiaoyu18
- · Replies 37 ·
Converting 180 lb force to mass in English units
- Roundandround
- · Replies 3 ·
Determine tensor of inertia of a rod
- Like Tony Stark
- · Replies 1 ·
Classical Mechanics: Linear movement against a constant force
- cemtu
- · Replies 4 ·
Classical Mechanics "variable mass" linear motion problem in one dimention.
- cemtu
- · Replies 11 ·
Is My Solution for Centripetal Force in a Spiral Orbit Correct?
- cemtu
- · Replies 5 ·
Conservation of momentum when a ball hits a wall
- Amik
- · Replies 9 ·
Conservation of momentum — Water dropped from a firefighting airplane
- Amik
- · Replies 22 ·
How Is Impulse Calculated in Volleyball?
- ravirodrigues
- · Replies 12 ·
Moving an adiabatic partition in an adiabatic container
- FranzDiCoccio
- · Replies 49 ·
Young's modulus — Finding the change in the length of a metal bar under stress
- chriscarson
- · Replies 20 ·
A spool that rotates and slides freely while pulling a mass
- AL115
- · Replies 18 ·
How do I predict rogue waves using simple probability models ?
- fRod57
- · Replies 5 ·
Gauss-Theorem on a solid dielectric sphere
- Guillem_dlc
- · Replies 1 ·
Keep working on the liquid pressure problem
- vxiaoyu18
- · Replies 3 ·
Collisions in special relativity
- rashida564
- · Replies 2 ·
Finding u and v for a moving rocket with Lorentz transformations
- rashida564
- · Replies 13 ·
Heat loss from a hot water tank
- sci0x
- · Replies 1 ·
Two different answers for work done during compression
- etotheipi
- · Replies 3 ·
When to use Hooke's law vs energy conservation for springs?
- NickStar
- · Replies 6 ·
How Does Gravity Influence Spring Potential Energy in Physics?
- NickStar
- · Replies 2 ·
Why Can't Forces Replace Energy Conservation for Spring Stretch?
- CaglarKorkmazgoz
- · Replies 7 ·
How Do You Calculate the Acceleration of a Box on Banked Wheels?
- tamim94
- · Replies 1 ·
What is Kepler's Second Law and How Does it Relate to a Planet's Time Period?
- tanaygupta2000
- · Replies 16 ·
Platinum resistance thermometer and Kirchoff's Laws
- penroseandpaper
- · Replies 1 ·
Question on four momentum squared
- bonbon22
- · Replies 16 ·
Perpendicular forces acting in x and y directions
- Bolter
- · Replies 8 ·
Heisenberg's Uncertainty Principle Question
- stephen8686
- · Replies 1 ·
Find the electric field on the surface of a sphere using Coulomb's law
- zelscore
- · Replies 6 ·
Time taken for sound to travel between two moving observers
- Saptarshi Sarkar
- · Replies 6 ·
How Does Tension Contribute to Climbing Power?
- Crystal037
- · Replies 4 ·
Recoil-powered car launching projectile after 5s delay
- CheatCod
- · Replies 11 ·
Angular momentum of two particles connected by a rigid bar
- Jenny Physics
- · Replies 14 ·
How do I start out this project? (rogue waves)
- fRod57
- · Replies 8 ·
How do physicists/mathematicians verbalize these symbols?
- lightlightsup
- · Replies 3 ·
[Mechanics] Calculate the braking torque
- hugo_faurand
- · Replies 4 ·
What is usually the time-derivative of i-hat?
- lightlightsup
- · Replies 15 ·
Ball launching off of a tray connected to a spring
- Elias Waranoi
- · Replies 8 ·
Linear Thermal Expansion with respect to time
- NP04
- · Replies 3 ·
Interpreting velocity vectors in fluid mechanics diagrams
- denniszhao
- · Replies 8 ·
Instantaneous moment of inertia of an object
- Bolter
- · Replies 28 ·
Surface Charges on a Coaxial Cable
- cpburris
- · Replies 1 ·
Why Does Pulling a Cord Cause a Spool to Move Right?
- Leo Liu
- · Replies 12 ·
Did I solve part e) correctly using energy and Newton's laws?
- Bolter
- · Replies 5 ·
Accounting for Liquid Water Density in Ideal Gas Pressure Calculations
- dbag123
- · Replies 6 ·
Confusing Derivation of torque acting on disk question
- Bonbon32
- · Replies 3 ·
Understanding Axial Loading On a Member
- tomtomtom1
- · Replies 2 ·
A harmonic wave with a frequency and an amplitude
- Ammar2211
- · Replies 11 ·
How Do I Calculate Heat Transfer by Conduction Using Thermal Conductivity?
- Bolter
- · Replies 8 ·
Spring constant from mass vs period vs frequency vs mass plots
- Cloruro de potasio
- · Replies 10 ·
Density of air at one atmosphere pressure
- Bolter
- · Replies 3 ·
Rotational motion: Number of revolutions before a flywheel comes to rest
- Bolter
- · Replies 2 ·
Electric field inside a polarized dielectric sphere
- Saptarshi Sarkar
- · Replies 2 ·
How Long Does it Take for a Motorcycle to Overtake a Car?
- rtareen
- · Replies 5 ·
Estimating oil molecule diameter
- Bolter
- · Replies 6 ·
Block dropped on vertical spring: maximum energy and compression
- Ammar2211
- · Replies 8 ·
What is the significance of In in the context of Thevenin equivalents?
- S R Wilder
- · Replies 3 ·
Mass of Gas Ejected: 1.25kg - Is it Reasonable?
- Bolter
- · Replies 1 ·
How Do You Find Extragalactic Cepheid Variable Databases?
- SoulOfSword_
- · Replies 2 ·
Constant of thermal conductivity and heat flow in a given time
- Bolter
- · Replies 2 ·
Bernoulli equation in a closed loop system
- icham
- · Replies 8 ·
Rotating flywheel problem
- Bolter
- · Replies 3 ·
Calculate the margin of error in this physics lab
- VitaminK
- · Replies 12 ·
Is the Loss of Kinetic Energy Related to the Volume of a Copper Atom?
- Bolter
- · Replies 4 ·
The Mystery of Purple Objects: Understanding Electromagnetic Force
- Amoghgirgaonkar
- · Replies 3 ·
Deriving the pressure energy equation from first principles
- tomtomtom1
- · Replies 3 ·
Does pushing a box 63 m with 10 N require 630 J of energy?
- tomtomtom1
- · Replies 3 ·
Does Polarity and Current Direction Affect Energy Flow in AC Circuits?
- charminglystrange
- · Replies 2 ·
Rotational motion and finding the moment of inertia
- Bolter
- · Replies 6 ·