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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What Is the Trajectory of an Object Dropped from an Airplane?
- cutie05
- · Replies 1 ·
How Do You Calculate Original Speeds from Mass and Kinetic Energy Differences?
- don123
- · Replies 3 ·
Relative Velocities: Solving a Physics Problem
- Pseudo Statistic
- · Replies 3 ·
Crate dragged by rope at 15° above horizontal
- adp5025
- · Replies 6 ·
What is the change in internal energy of the gas?
- Polo12
- · Replies 5 ·
Solving Thermal Physics Problem: Specific Heat Calculation
- metalmagik
- · Replies 2 ·
Can a car move on a conveyor belt that matches its speed in opposite direction?
- Stussy
- · Replies 11 ·
How does KE get changed into internal energy?
- something_about
- · Replies 3 ·
Change in momentum of a ball bouncing off the floor
- Huskies213
- · Replies 2 ·
How Do You Solve This Newton's Law of Motion Problem?
- kfink85
- · Replies 3 ·
What is the Formula for Work?
- Eric1
- · Replies 3 ·
Accelerating an inclined plane
- syang9
- · Replies 1 ·
What affects resonant frequency of a vibrating string or wire?
- revan
- · Replies 5 ·
Why is the net force on a dipole from another dipole zero?
- cherrios
- · Replies 1 ·
Express the density of a solid substance varying with temperature
- endeavor
- · Replies 1 ·
Angular Momentum of an airplane
- lunarskull
- · Replies 3 ·
Calculating Muzzle Velocity of a Spring-Powered Civil War Cannon
- nitrostar
- · Replies 5 ·
The Magnitude of the Force That One Line Charge Exerts On The Other
- Tachyon
- · Replies 1 ·
Physics: an elephant pushing a shopping cart
- N_L_
- · Replies 4 ·
Plane polarized oscilation of a spring
- DaTario
- · Replies 1 ·
Find Average Velocity on a Data Graph
- physhelp
- · Replies 5 ·
Brick thrown from roof: checking velocity, height and time calculations
- Alain12345
- · Replies 6 ·
Can a vector have a component whose magnitude is greater than itself?
- David Furlong
- · Replies 1 ·
Calculating Force of Friction: Newton's Law Applied in a Physics Experiment
- oooo
- · Replies 1 ·
Which lead has a higher potential in this electromagnetic flowmeter calculation?
- matt85
- · Replies 6 ·
Calculating Rates of Change in Calculus Problems
- Hollysmoke
- · Replies 2 ·
Simple Centripetal Force Question
- chrisdapos
- · Replies 4 ·
Pulley problem: sand being poured into a bucket tied to a block
- N_L_
- · Replies 1 ·
Finding force from work and barrel length in human cannonball problem
- Eric1
- · Replies 2 ·
How to Calculate Drag Coefficient for a Fire Helicopter's Bucket?
- finlejb
- · Replies 6 ·
Is Fg the Only Force to Consider for Ft4 in a Pulley System?
- N_L_
- · Replies 1 ·
Pendulum experiment: finding g and k from period vs height
- dan greig
- · Replies 5 ·
Kinetic energy and thermal energy
- something_about
- · Replies 6 ·
Why Is PV=0 for Solids Despite Exerting Pressure?
- asdf1
- · Replies 3 ·
Solving Spring Elasticity and Kinetic Energy Problems
- truckerron1
- · Replies 3 ·
I don't understand why this is wrong (Work and kinetic energy problem)
- frankfjf
- · Replies 4 ·
Finding combined spring constant for two springs in series
- johnny872005
- · Replies 6 ·
What is the potential energy of a compressed spring on an inclined plane?
- scavok
- · Replies 7 ·
How Accurate Are These Calculations for Simple Harmonic Motion?
- nyyfan0729
- · Replies 1 ·
Behaviour of iron in magnetic field
- KKK
- · Replies 10 ·
Not sure how to start this (Power problem)
- frankfjf
- · Replies 4 ·
Just wondering, how do you combine series?
- johnny872005
- · Replies 4 ·
Force on Series of Springs: Does It Equal Sum?
- ownsail
- · Replies 4 ·
Solve for Braking Acceleration for Emergency Stop
- rculley1970
- · Replies 14 ·
Problems with Velocity and Acceleration
- physhelp
- · Replies 3 ·
Steel ball dropped onto a plate
- Jacob87411
- · Replies 3 ·
Drawing velocity time graphs from distance-time graphs
- Alain12345
- · Replies 2 ·
Projectile rock hitting a moving van problem
- N_L_
- · Replies 1 ·
One more tricky 2nd Newtonian Law with friction problem
- frankfjf
- · Replies 1 ·
Metal sphere and electric field
- cherrios
- · Replies 5 ·
How many times must a student run up stadium stairs to lose 1 lb of fat?
- Jacob87411
- · Replies 6 ·
Difficulty with force problems involving friction
- frankfjf
- · Replies 10 ·
Can You Solve These Spring and Block Problems?
- johnny872005
- · Replies 11 ·
Solve for a in "S = ut + 1/2 at^2" - Dragon2309
- dragon2309
- · Replies 7 ·
Where can I find the proof for charge conservation?
- FrostScYthe
- · Replies 1 ·
What Does a = g Imply in Physics Equations?
- dragon2309
- · Replies 5 ·
Calculating Charge and Tension in a Uniform Electric Field
- frozen7
- · Replies 2 ·
What is the Work Done on a Block by Different Forces?
- Jacob87411
- · Replies 3 ·
How can I find the normal force without knowing the applied force?
- wsuhooper
- · Replies 6 ·
Radio wavelength, satellite orbits, arcsec conversion, and Doppler effect
- astronomystudent
- · Replies 16 ·
How Do You Solve for Time in the Kinematics Equation s = ut + 1/2 at^2?
- kitehigh
- · Replies 1 ·
Having trouble with applying Newton's 2nd Law
- frankfjf
- · Replies 17 ·
Projectile Motion football kick Question
- balm
- · Replies 7 ·
How Does Acceleration Affect Travel Time Between Two Rally Checkpoints?
- teng125
- · Replies 4 ·
SOS: Pendulum and Spring Problems
- hydrophobicmermaid
- · Replies 2 ·
Billiard ball collision with 2D momentum conservation
- Blairmc2
- · Replies 3 ·
Spring block: why using PE formula gives wrong speed?
- Jacob87411
- · Replies 2 ·
Circular Motion of a car making a turn
- finlejb
- · Replies 11 ·
When will these cars pass eachother - kinematics
- teng125
- · Replies 6 ·
Uniform circular motion and Ferris wheel
- zolloz89
- · Replies 5 ·
Modification to metal sphere problem
- cherrios
- · Replies 1 ·
Force on a driver going around a curve at different speeds
- finlejb
- · Replies 3 ·
Physics - Simple Harmonic Motion
- nyyfan0729
- · Replies 1 ·
Why doesn't a charged metal plate lose charge under certain light?
- Marshall878
- · Replies 2 ·
Block colliding with spring: finding x(t), period, and kinetic energy at t=4s
- nyyfan0729
- · Replies 1 ·
Confirming an observation about Newton's Laws
- frankfjf
- · Replies 3 ·
Is D=1/2*a*t^2 the Right Formula to Calculate Rocket Height?
- JEscribir
- · Replies 3 ·
Evidence for wave and particle properties of light
- kitkat
- · Replies 1 ·
Two hockey players colliding at 125 degrees
- Huskies213
- · Replies 1 ·
How do I solve these physics problems involving variables and equations?
- hoseA
- · Replies 2 ·
Electric charges and force (tricky test question)
- vmc303
- · Replies 15 ·
Deriving divergence of E from Gauss's law with a cubic surface
- Lisa...
- · Replies 11 ·
What is Dimensional Analysis in Atmospheric Science?
- button2
- · Replies 2 ·
Finding the work function using stop potential
- Calmeir
- · Replies 3 ·
Initial horizontal velocity of the boat
- teng125
- · Replies 11 ·
Centripitalforce problem (hard)
- trondern
- · Replies 13 ·
How fast will the electron be travelling?
- Brooke22
- · Replies 3 ·
How high will a bullet fired straight up go and at what velocity will it return?
- Creative
- · Replies 9 ·
Simple Mechanics Problem: Finding Minimum Mass on an Inclined Plane
- steelphantom
- · Replies 5 ·
Calculating Revolutions of Mass in a Horizontal Circle
- rachael
- · Replies 5 ·
Calculating Electron Velocity: Ek = ½ MV^2
- Brooke22
- · Replies 3 ·
Greatest wavelength to ionize an unexcited hydrogen atom
- heliumhigh
- · Replies 1 ·
Calculating 5 Longest Lyman Series Wavelengths
- Tony11235
- · Replies 1 ·
Newton's 2nd Law problem (I think )
- frankfjf
- · Replies 3 ·
Electron Speed Calc: Solving Magnetism Problem with F=qvB
- jakeowens
- · Replies 2 ·
Calculating Maxima in Radio Wave Interference Around Two Towers
- G01
- · Replies 9 ·
Calculating Electric Field and Potential of a Charged Hollow Ball
- cherrios
- · Replies 4 ·
Rod against wall with hanging weight and friction
- joe889
- · Replies 3 ·
Query About Torque: Understanding Cyclist's Circular Motion
- recon
- · Replies 5 ·
Terminal velocity in spray dryer
- elmariachi
- · Replies 1 ·