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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Finding an initial speed (projectile motion)
- lilmul123
- · Replies 8 ·
Parallel plate capacitor electric field problem
- megr_ftw
- · Replies 8 ·
Why does -ik + 4ki equal 5j and not -5j?
- Neophyte
- · Replies 5 ·
Dimensionally correct equations
- dboy83
- · Replies 18 ·
How Do You Calculate Vector Sums and Differences in Physics?
- tjbateh
- · Replies 5 ·
Dimensional analysis of momentum and force expressions
- budd99
- · Replies 5 ·
Finding the Shortest Path for Walking in a Room
- tjbateh
- · Replies 5 ·
What Is the Speed at the Top of a Projectile's Trajectory?
- Mr530
- · Replies 2 ·
Ball be thrown to have maximum horizontal distance
- joemama69
- · Replies 15 ·
Displacement, velocity, acceleration
- joemama69
- · Replies 12 ·
Kinetic Energy in Joules of an Object
- jpartdq
- · Replies 1 ·
How Much Water Does Cobalt Displace?
- sharrd
- · Replies 1 ·
How Do You Solve the Relative Motion Problem Between Mary and Jane?
- wick85
- · Replies 3 ·
Is our experimental value for gravity acceptable?
- Arshad_Physic
- · Replies 4 ·
One Dimensional Hot Air Balloon Kinematics
- Flippit
- · Replies 2 ·
Calculating the Accepted Value of g with a Pendulum
- Mitchtwitchita
- · Replies 4 ·
Initial Velocity of a projectile, how?
- free-node-5
- · Replies 6 ·
Finding the point where Earth and Moon's gravitational forces balance
- pointintime
- · Replies 28 ·
How Do You Calculate Proton Velocity and Acceleration in an Electric Field?
- exitwound
- · Replies 21 ·
What are the solutions for the given vector problem?
- Gattz
- · Replies 3 ·
Helium balloon lifting string and pressure in accelerating fluid sphere
- novelized
- · Replies 2 ·
Adding and subtracting three 42 m vectors at 29°, 197°, and 314°
- tjbateh
- · Replies 2 ·
Resistance and Resistivity of tungsten wire
- Unknowned
- · Replies 1 ·
Physics Calculation problems, for exam
- Ion1776
- · Replies 7 ·
Zero angle launch problem: Find height given inital speed and angle
- egadda2
- · Replies 1 ·
Determining speed of an object with only a meter stick?
- fattydq
- · Replies 7 ·
Calculating Percentage Error for a Circular Disc with (10 +/- 0.2)cm Radius
- Boogeyman
- · Replies 1 ·
Free fall acceleration of rocket
- rich1116
- · Replies 5 ·
How to Calculate Projectile Motion for a Thrown Stone
- anna_chem
- · Replies 2 ·
Electric field from line charge: can the distance be negative?
- 1stepatatime
- · Replies 3 ·
How Is Velocity Calculated in Physics Problems?
- xkrazaylaught
- · Replies 1 ·
Acceleration on an Incline: Solving for Time and Distance
- chelseaalyssa
- · Replies 2 ·
Calculating Vertical Distance of a Thrown Pebble from a Pyramid
- joemama69
- · Replies 6 ·
Lemming jumping horizontally off a 20 m cliff over 4 m rocks
- nrw
- · Replies 4 ·
Solving Acceleration Problem: Time & Distance Calculations
- gztiger
- · Replies 1 ·
How Can I Solve These High School Physics Problems?
- arunb
- · Replies 1 ·
In free-fall acceleration, how do I figure when g is positive or negative?
- Elis
- · Replies 3 ·
Conceptual Rotational Motion Question
- PhysicsPariah
- · Replies 4 ·
Uniformly distributed electric field lines
- rwrem
- · Replies 1 ·
Electric flux (positive, negative, or zero?)
- rwrem
- · Replies 1 ·
Can Two Waves of the Same Frequency Create a Standing Wave on a String
- m.medhat
- · Replies 2 ·
Uniform Circular Motion: Speed of the bullet
- mehacute
- · Replies 1 ·
Calculating Bungee Length and Extension using Hooke's Law
- frisy4
- · Replies 5 ·
Testing golf ball aerodynamics.? how?
- lukasstewart
- · Replies 2 ·
Refraction using Snell's law - critical angles
- jsalapide
- · Replies 2 ·
One-dimensional motion with constant acceleration
- tja2468
- · Replies 1 ·
Comparing acceleration magnitudes from a v-t graph at time t1
- xiayu1993
- · Replies 1 ·
Constant acceleration from X vs. T on logger pro
- PhysicsMark
- · Replies 2 ·
Velocity of high temperature hydrogen atom
- timbot
- · Replies 9 ·
Line charge density of a 30µC wire 7.0m long
- tnutty
- · Replies 1 ·
Why do two charged ping pong balls hang at different angles if charges repel equally?
- DarylMBCP
- · Replies 15 ·
How Is Electric Potential Calculated for a Curved Rod?
- exitwound
- · Replies 3 ·
Answer Two Balls Thrown: Which Touches Ground First?
- usmarine
- · Replies 4 ·
How Do You Calculate the Electrostatic Force Between Two Charged Particles?
- tag16
- · Replies 6 ·
Weather rocket max altitude and time in air
- Mirole
- · Replies 3 ·
How Much Force Does a Track Exert on a Speeding Car?
- kashiark
- · Replies 3 ·
Rubber Ball Dropped on Plane: A or B?
- usmarine
- · Replies 1 ·
Finding velocity from displacement-time data for a dropped ball
- lmn
- · Replies 1 ·
Position of package when dropped from plane
- katie_alsteen
- · Replies 1 ·
Finding Magnetic Field of Alpha Particle in a Circle
- howt
- · Replies 6 ·
Dragster acceleration and net force with 873 kg mass in 0.59 s
- kashiark
- · Replies 6 ·
What is the Peak Height of a Tennis Ball Shot Upward?
- Leo34005
- · Replies 6 ·
Why do electromagnetic waves travel slower in other mediums?
- DarylMBCP
- · Replies 2 ·
Does Zero Electric Potential Necessarily Imply Zero Electric Field?
- lockedup
- · Replies 1 ·
Resultant displacment and magnitude
- djtsmith007
- · Replies 1 ·
Maximum height on high-gravity planet for thrown ball
- Bryon
- · Replies 3 ·
Velocity of spring being made to go in a circle
- jillf
- · Replies 2 ·
What are the forces on you in an elevator?
- kashiark
- · Replies 2 ·
Why does Fg = mg if net force isn't always gravity?
- pointintime
- · Replies 7 ·
Finding the Magnitude of B in Vector Addition
- devmgnt
- · Replies 5 ·
What are the units for m and b in y=mx+b when y=(m1-m2)g and x is acceleration?
- chelseaalyssa
- · Replies 5 ·
Calculating the Torque for a Hand-Driven Merry-Go-Round
- kaite
- · Replies 3 ·
Potential Difference in a varying field
- exitwound
- · Replies 11 ·
Is the Gas in the Tank Helium or Oxygen?
- 838
- · Replies 1 ·
Order of Magnitude: Earth's Acceleration Towards You
- dizco29
- · Replies 5 ·
Power and velocity as a function of time
- RoyalCat
- · Replies 2 ·
Calculating Potential and Radius of a Charged Spherical Droplet
- exitwound
- · Replies 3 ·
Refrigeration: The Equivalent Rate of Transport of Heat in Watts?
- chunkytuna21
- · Replies 3 ·
Energy and quality factor in parallel RLC circuits
- Eric_meyers
- · Replies 1 ·
Projectile Motion - Hitting an edge
- Mcoroklo
- · Replies 4 ·
Normal reaction force of a roller to a wedge and the velocity
- MechaMZ
- · Replies 1 ·
Potential Difference across Capacitor.
- Aznhmonglor
- · Replies 6 ·
How Far Did the Backpacker Walk East?
- triplel777
- · Replies 12 ·
Will aluminum and copper blocks connected by a string on steel start moving?
- MechaMZ
- · Replies 16 ·
Why Do Vector Components Give Different Displacement Results?
- Acez
- · Replies 6 ·
Minimum time to move 3.45 m with different coefficients of friction
- mkwok
- · Replies 15 ·
Finding dielectric constant when 240 µC extra charge accumulates
- wadini
- · Replies 1 ·
Electricity and potential energy
- wadini
- · Replies 3 ·
Kinetic Energy of Ion accelerated across potential difference
- iuchem16
- · Replies 2 ·
How to write conservation of momentum hypothesis in if-then format
- shredder666
- · Replies 5 ·
Finding air time for Olympic long jumper with 7.7m jump distance
- Amel
- · Replies 20 ·
Thermodynamics, energy, work, heat problem
- edsuave
- · Replies 9 ·
Force on point charge at origin with charges at 50 cm and 100 cm
- PetetheGreek
- · Replies 3 ·
Tension in wire connecting charged conducting spheres
- ktobrien
- · Replies 4 ·
Determining speed and acceleration magnitude from graph
- malik123
- · Replies 4 ·
What Determines the Acceleration Direction in Pendulum Motion?
- Lemniscate
- · Replies 3 ·
How Do You Calculate the Velocity of a Canoe Relative to a River?
- Lemniscate
- · Replies 1 ·
Calculating acceleration due to gravity on a planet
- Bryon
- · Replies 3 ·
Acceleration with limited known variables Question
- bbauer2
- · Replies 4 ·
Displacement and Velocity Problem
- Loppyfoot
- · Replies 2 ·