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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How Far Does a Ball Fall Vertically in Projectile Motion?
- miamirulz29
- · Replies 13 ·
Question: Conservation of Momentum
- roane
- · Replies 4 ·
Do Weight Differences Affect Speed on a Frictionless Hill?
- JG89
- · Replies 3 ·
4-9 Force/mass - Newton's Second Law question
- Ant29
- · Replies 1 ·
Rocket Height-Kinematic Question
- Chandasouk
- · Replies 9 ·
Velocity and position of electron
- tjbateh
- · Replies 2 ·
How Does the Driven Oscillator ODE Describe Long-Term Motion?
- Eric_meyers
- · Replies 1 ·
Two in-phase loudspeakers on a coordinate plane
- tiger1
- · Replies 2 ·
How Do You Calculate Original Velocity from Momentum in a Two-Spacecraft System?
- peanut15
- · Replies 1 ·
Coulomb's Law: Calculating Force on Charged Particles
- tag16
- · Replies 1 ·
Rewriting Planck's law with dimensionless variable x
- Heisenberg.
- · Replies 1 ·
Sol'n: Law of Cosines - Find Direction to Return After Walking 220m, 50m
- panthergk
- · Replies 1 ·
How Do Electric Balls Approach Each Other as They Lose Charge?
- TheLegace
- · Replies 2 ·
Kirchoff's laws, emf and internal resistance
- alexburns1991
- · Replies 9 ·
Why does the momentum of an object affect the force of impact?
- muz_501
- · Replies 2 ·
Longitudinal waves in a clamped metal rod
- jemerlia
- · Replies 1 ·
How Much Power Does a 30m Diameter Windmill Generate?
- desi01
- · Replies 1 ·
Biomechanics Static Forces on handle of locked door
- muddyjch
- · Replies 1 ·
How Do I Find the Electric Field for the Whole Plane Using My Lab Data?
- Josh930
- · Replies 1 ·
Car accelerating on 150m curve: revolutions until total acceleration reaches 2.40 m/s²
- creechur
- · Replies 8 ·
Winch puller tension for 960 N·m moment at point D
- talaroue
- · Replies 7 ·
Free Fall Question [ Need Assistance]
- pharmguy
- · Replies 2 ·
Equipotential Lines and Electric Fields Labratory Experiment
- llauren84
- · Replies 3 ·
How does F = -KX become A = -KX
- student321
- · Replies 2 ·
Gravity Question: Levitate Objects on Small Planets
- PacersRule07
- · Replies 2 ·
Car coasting up a 30 degree grade with initial speed 25 m/s
- avaholic
- · Replies 5 ·
Equivalent Capacitors and their charges:
- spriter
- · Replies 1 ·
Max speed and acceleration of pistons in a 4-cylinder engine using SHM
- ibysaiyan
- · Replies 3 ·
Can a Positively Charged Insulating Rod Charge Two Metal Spheres Differently?
- nns91
- · Replies 1 ·
What Is the Electric Field in the Overlapping Region of Two Charged Spheres?
- th5418
- · Replies 1 ·
Calculating Contact Forces for Pushing Boxes
- dorian_stokes
- · Replies 7 ·
Why does θ have time dependence in y = a(1 + cos θ)?
- jimz
- · Replies 1 ·
Confirm my answers for some simple geodesy questions
- inspire2009
- · Replies 1 ·
Magnitude and Direction of Electric Field
- bwilhelm
- · Replies 2 ·
Finding the value of the element dq
- warrior_1
- · Replies 3 ·
Finding quadriceps force for torque equilibrium with angles
- ally1h
- · Replies 9 ·
Projectile Motion: Solving for Horizontal Displacement from a 200m Cliff
- jlm342000
- · Replies 5 ·
Calculating Sound Levels in dB: How to Convert Intensity to Decibels
- RedPhoenix
- · Replies 2 ·
Vector addition: why do I get 7.9 km instead of 7.8 km?
- elpermic
- · Replies 5 ·
I have been spending 2 hrs on this vector problems i don't get it?
- elpermic
- · Replies 1 ·
A force perpendicular to velocity does not change speed?
- mackygood
- · Replies 8 ·
Electric field inside a uniformly charged insulator
- 0blivi0n
- · Replies 9 ·
How Do You Calculate the Potential Difference in a Charged Spherical Insulator?
- deerhunt713
- · Replies 3 ·
Does a bouncing ball violate conservation of momentum?
- chelseaalyssa
- · Replies 5 ·
Vector clock and vector dog displacement problems
- M1ZeN
- · Replies 2 ·
Calculating the work against gravity?
- mscott
- · Replies 3 ·
How many acre feet of water fell on the town during the thunderstorm?
- elpermic
- · Replies 3 ·
Solve PV=nRT for V on Venus at STP
- amiv4
- · Replies 1 ·
Speed of a partical as it approaches stagnation point
- Wildcat04
- · Replies 1 ·
Car collision-speed passenger crashes into dashboard
- physicsquest
- · Replies 3 ·
Calculating Airplane Speed Using Time Dilation
- davesface
- · Replies 5 ·
Motorcycle Catches a Car-Kinematics Question
- Chandasouk
- · Replies 1 ·
Electric field from a 25 cm rod at 69 cm perpendicular distance
- Liketothink
- · Replies 5 ·
Finding the distance between a point and a level curve
- yeahhyeahyeah
- · Replies 2 ·
Precision during free-fall experiments.
- Rumor
- · Replies 1 ·
Centripetal Acceleration check my reasoning
- pointintime
- · Replies 4 ·
Finding Acceleration in a Shopping Cart Rolling Downhill
- Mirole
- · Replies 3 ·
Capacitance of a spherical cell
- fatsack
- · Replies 5 ·
Mass on spring: finding displacement, period, and max velocity
- ibysaiyan
- · Replies 3 ·
What Went Wrong in Solving the Ball Projection Problem?
- Sealy
- · Replies 2 ·
How does tripling launch speed affect projectile range?
- tomhall
- · Replies 1 ·
Vertical displacement basketball problem
- dude24
- · Replies 8 ·
Understanding t_max in the Drag Racer Problem
- jcsp101
- · Replies 9 ·
How High Will the Rocket Be When the Fuel Canister Hits the Launch Pad?
- cwalden91
- · Replies 1 ·
Determining Force applied so mass will stay at rest
- uazaga
- · Replies 3 ·
Total resistance of resistors in series
- TonyThaGreat
- · Replies 6 ·
Solving the Wave Equation with D=A sin kx cos \omegat
- physicsnewb7
- · Replies 1 ·
How can the amount of work required to move two charges be calculated?
- tooold
- · Replies 3 ·
Acceleration of a solid cylinder on an incline
- chelseaalyssa
- · Replies 3 ·
Combustion of ethanol in O2 at constant T, fixed V, and constant P
- ipitydatfu
- · Replies 8 ·
Relative error and measurement accuracy problem
- usamahashimi
- · Replies 1 ·
Pulleys, tension, and blocks oh my
- grepory
- · Replies 23 ·
Time-dependent force applied to object: when does it reach 15 m/s?
- MechaMZ
- · Replies 17 ·
Effect of dropping putty on a block doing SHM
- issacnewton
- · Replies 4 ·
What Is the Result of -4.00 C·(4.00 A×B) in Vector Calculations?
- Gattz
- · Replies 1 ·
What is the Divergence Form of Gauss's Law?
- warrior_1
- · Replies 1 ·
Problems with negatives: Can magnification be negative?
- PrincePhoenix
- · Replies 4 ·
Calculating Electric Field Strength: +5.0810^-6 Charge at 0.3m from Sphere
- pat666
- · Replies 5 ·
What is the net electric field at a point between two charged spheres?
- Oijl
- · Replies 3 ·
Easy Electric Potentional Problem
- exitwound
- · Replies 7 ·
Which Ball Wins the Race According to Bernoulli's Principle?
- sa_ta
- · Replies 8 ·
Does air temperature affect air resistance?
- sa_ta
- · Replies 6 ·
Solve for Initial Speed: Dropping Chestnuts from a Tree
- unigal13
- · Replies 3 ·
Cart motion problem with velocity-time graph
- joemama69
- · Replies 3 ·
Charged ball attached to a charged sheet
- Oijl
- · Replies 1 ·
What Is the Time Needed to Take Off?
- c0ld
- · Replies 2 ·
Proton is shot away from inf. charged plane
- megr_ftw
- · Replies 5 ·
Initial Velocity without acceleration given.
- c0ld
- · Replies 3 ·
Doppler Effect radio broadcasting
- atarr3
- · Replies 17 ·
Rocket with constant acceleration for 16s reaching 5100m at 20s
- Slacker142
- · Replies 4 ·
How Much Force Before Ethan Slips on an OSHA Compliant Floor?
- Ion1776
- · Replies 1 ·
Vector displacement problem trouble
- M1ZeN
- · Replies 4 ·
Average acceleration of particle
- wick85
- · Replies 1 ·
Find distance traveled using acceleration graph
- denxnis
- · Replies 1 ·
How Do Forces Affect the Motion of a Doughnut?
- Kurogashi
- · Replies 1 ·
Calculating Time for Falling Crate in Projectile Motion
- bringme2life
- · Replies 1 ·
How Much Ice Does Antarctica Really Hold?
- elpermic
- · Replies 1 ·
How Do You Calculate the Charge of He2+?
- soupastupid
- · Replies 1 ·
If she hits the brakes, how far will she travel before stopping?
- rakesh44
- · Replies 1 ·
Position, velocity, and acceleration
- riffelr
- · Replies 1 ·