Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Threads
How Do You Calculate the Orbit Radii in Bohr's Model of the Hydrogen Atom?
- McLaugh
- · Replies 7 ·
What Do You Need to Understand About Kinematics to Solve Collision Problems?
- phoizgood
- · Replies 3 ·
Can a Rubber Band Replace a Steel Spring in Measuring Weight?
- OVB
- · Replies 3 ·
What are the dimensions of constants a and b in d=at+bt²?
- emma123
- · Replies 1 ·
Does container shape affect drainage rate when hole areas are equal?
- Carolyn
- · Replies 8 ·
Girl chasing accelerating car at constant velocity
- Iceman2032
- · Replies 8 ·
Why Is the Net Force on Both Cars Zero Despite Different Speeds?
- Skittles
- · Replies 1 ·
After how long will the balls be at the same height?
- davidw9
- · Replies 9 ·
Freefall-Type Question: Solving for Ball Catching and Building Length
- Iceman2032
- · Replies 4 ·
How Can You Build the Best Kraft Dinner Overhang Structure?
- td04
- · Replies 1 ·
Average acceleration of a hockey puck rebounding from a board
- Mono182
- · Replies 4 ·
Does acceleration have to be negative when slowing down?
- NIZBIT
- · Replies 3 ·
Spherical Electric Field - displacing a nucleuo
- FrogPad
- · Replies 1 ·
How to calculate the current in a discharge circuit after a certain time?
- smileandbehappy
- · Replies 7 ·
What are vectors in introductory physics?
- dianajanielle
- · Replies 4 ·
The smallest coefficient of friction.
- Fittler
- · Replies 1 ·
How Do You Calculate the X-Coordinate in Circular Motion?
- blimkie
- · Replies 3 ·
Catching a Ball Thrown at 30 m/s: Solving the Physics Problem
- mikefitz
- · Replies 3 ·
Car collision acceleration, cliff height, and falling package
- omelfata
- · Replies 1 ·
Projectile Motion Ball Calculation
- richievuong
- · Replies 2 ·
Problems with kinematics equations
- Byrgg
- · Replies 33 ·
Calculating Buckle Height of Steel Railroad Rail at 25°C
- ppchiu
- · Replies 1 ·
How do voltage to current and current to voltage converter circuits work?
- novrisa
- · Replies 1 ·
Police Question: How Far Does a Speeder Get Before Being Overtaken?
- arizona_cards_11
- · Replies 1 ·
Understanding Vector Cross Product: Finding the Angle Between Two Vectors
- physstudent1
- · Replies 2 ·
Length of tape needed to transfer 3.4e13 electrons
- pulseczar13
- · Replies 2 ·
The Parallel Plate Capacitor and Gauss Law?
- pinal08854
- · Replies 2 ·
Calculating String Tension for Hanging Picture (50N)
- Energize
- · Replies 9 ·
How Does Gravity Affect a Dropped Fish's Motion?
- arizona_cards_11
- · Replies 1 ·
Find the Flow Rate: Water Pipe Down a Hill
- Adman
- · Replies 1 ·
How Do You Calculate Electric Potential at Point P from a Uniformly Charged Rod?
- Adn4n
- · Replies 1 ·
Question on relative motion and circular motion.
- SilverLx
- · Replies 6 ·
Forces on an Inclined Plane Question
- catenn
- · Replies 1 ·
: Planck/Einstein and death of the universe
- KCvolunteer07
- · Replies 1 ·
Kinematics - Archer shooting arrow at apple
- Parallel
- · Replies 1 ·
How Long Does It Take a Stone to Fall 6 Meters?
- ben-newton
- · Replies 3 ·
Calculating Forces on a Coasting Car: Newton's Laws and Air Drag Calculation
- physicsgal
- · Replies 13 ·
Does Increasing Ramp Angle Double Ball Speed?
- opticaltempest
- · Replies 3 ·
Solving Escalator Motion Problems: A Shopper's Guide
- sultaN-PL
- · Replies 1 ·
Electric field from infinite charges
- DieCommie
- · Replies 6 ·
Kinematics Questions: Solving for Superman's Velocity and Building Height
- Mehta29
- · Replies 2 ·
Heat Transfer: Conversation of Energy problem.
- Water
- · Replies 2 ·
.Calculating Time for .22 Rifle Bullet to Stop in Soft Wood
- theonerealazn
- · Replies 1 ·
How Do You Calculate Relative Velocities in One-Dimensional Motion?
- sebmista
- · Replies 2 ·
Roller coaster displacement physics problem
- kiss the shrew
- · Replies 1 ·
Small drop in voltage change in power?
- boderam
- · Replies 1 ·
Finding projectile velocity 1.50 s after firing at 75.2 m/s
- ruthi
- · Replies 1 ·
Physics Problem: Free Falling Person Survival Speed
- St.Vampyre
- · Replies 2 ·
Calculating Frequency from Sound Samples
- Traveller
- · Replies 6 ·
Measuring distance using Ek and Ep?
- Clef
- · Replies 1 ·
Converting 60 Mi/H to M/s using unit conversion factors
- wtf_albino
- · Replies 2 ·
What is the final temperature and amount of material and water in each state?
- DanielT
- · Replies 1 ·
Couple of v. important problems
- Clef
- · Replies 1 ·
Star Wars: Assumptions of Outer Space
- Revolver
- · Replies 2 ·
Electric Field using Gaus's Law
- benndamann33
- · Replies 2 ·
Solving Physics Problem on Giancoli Ed 5 P 121
- jla2w
- · Replies 9 ·
Cosmolgy- Density of the Universe
- EP
- · Replies 2 ·
Do Force Diagrams Show Forces Exerted by the Object?
- catenn
- · Replies 1 ·
Calculating Acceleration on a Slide with Kinetic Friction
- hakojackie
- · Replies 18 ·
Calculating Average Lifetime of Particles at Rest
- msimard8
- · Replies 1 ·
Finding the magnitude and angle of four displacement vectors
- dboy83
- · Replies 4 ·
How Is the Force Between Two Sliding Blocks Calculated?
- tismisskris
- · Replies 1 ·
Electric field at corner of charged square or cube
- NotMrX
- · Replies 1 ·
What is the Mass and Weight of a Truck Accelerating with Newton's Second Law?
- BSBarb
- · Replies 3 ·
Static friction and kinetic friction
- Revolver
- · Replies 5 ·
Cool Room Air With Fan By The Window
- NotMrX
- · Replies 3 ·
How Does Kinetic Friction Affect Motion on a Level Surface?
- Lmbrando
- · Replies 1 ·
Differential equations for parallel LC circuits coupled by capacitor
- Israfil
- · Replies 11 ·
Average acceleration of bouncing ball off wall
- wakejosh
- · Replies 9 ·
Kinematics - Grabbing a Rebound?
- johndoe3344
- · Replies 6 ·
How Does an Electron's Path Deflect Over a Charged Plate?
- eltel2910
- · Replies 1 ·
How Does the Turkish Bow Calculate Maximum Arrow Range?
- GreenLRan
- · Replies 2 ·
Why is the Second Derivative Negative in SHM?
- Pseudo Statistic
- · Replies 3 ·
Calculate the work as the MINIMUM amount of work
- danago
- · Replies 5 ·
How Far Will the Dart Travel When Fired from a Moving Incline?
- Nemi
- · Replies 1 ·
Horizontal Force - Friction Problem
- tylenolman
- · Replies 1 ·
How Does a Governor Work in Mechanical Systems?
- fara0815
- · Replies 5 ·
How Do You Calculate Electric Flux Through a Pyramid's Slanted Surfaces?
- benndamann33
- · Replies 1 ·
A question on the Principle of Floatation
- fujiwara_sai
- · Replies 8 ·
Charge vs. Gravity: Calculating Electrostatic to Gravitational Force Ratio
- tony873004
- · Replies 2 ·
How Can I Solve These Introductory Physics Problems?
- wakejosh
- · Replies 2 ·
Projectile motion (No initial velocity or time)
- PascalPanther
- · Replies 3 ·
How far has it traveled in this time?
- sweetshelly
- · Replies 4 ·
Newton Problem (2nd Law of Motion)
- greeenmonke
- · Replies 3 ·
Calculate Upper Scale Reading for Suspended 50kg Crate Using Spring Scales
- mikefitz
- · Replies 3 ·
How to Calculate Charge Density on an Irregular Conductor?
- benndamann33
- · Replies 5 ·
Inclined Plane and soccer ball
- luckii
- · Replies 4 ·
Ok I know the answer and the diagram but
- Revolver
- · Replies 1 ·
Acceleration due to Gravity/Terminal Speed Problem
- CityNoise
- · Replies 2 ·
Ranking velocities from motion diagrams A, B, and C
- sythetickitty
- · Replies 2 ·
Problem with Forces and Newton's Laws
- catenn
- · Replies 7 ·
Velocity, distance, time problem
- hbomb
- · Replies 2 ·
Finding the Zero Point of Electric Field from a Dipole Configuration
- czaitz
- · Replies 2 ·
What would happen if there was no air resistance during rain?
- Arkronus
- · Replies 9 ·
How Do You Calculate Acceleration in Physical and Ballistic Scenarios?
- BunDa4Th
- · Replies 3 ·
Are Vector A + Vector B and Vector A - Vector B Perpendicular When |A| = |B|?
- Tensaiga
- · Replies 6 ·
What is the volume of a diver's air bubble at the surface of the sea?
- dave2945
- · Replies 9 ·
Solving the Puzzle of the Suspended Brick
- trueblue
- · Replies 2 ·
What is the magnitude of charge inside the box
- eltel2910
- · Replies 4 ·