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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Solve a Simple Physics Problem: Boat Speed and River Flow in 30 Minutes
- BuBbLeS01
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Elastic collision between neutrons and deuterons
- Edwardo_Elric
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Conservation of momentum and hockey puck
- Edwardo_Elric
- · Replies 3 ·
Calculating Distance Between Two Rocks When Thrown at 30 Degrees
- flash21
- · Replies 5 ·
Find RPM at which Lower Cord Goes Slack in Figure 5.72
- Niles
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What is Angular Momentum and How Do I Calculate It?
- acerulz54
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Modeling of pendulum with external horizontal force
- changyongjun
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Finding the x and y coordinates of vector rAB
- ThomasHW
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Decibel questions, how many people are cheering
- VTC-nerds
- · Replies 7 ·
When Does the Turtle Reach 10 cm from the Starting Point for the Third Time?
- physstudent1
- · Replies 3 ·
No Answer Found: Need Assistance with Problem
- frasifrasi
- · Replies 4 ·
Solve Oscillation Problem: Find C Value to Avoid Oscillations
- Petrulis
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Problem sets and solutions for introductory physics practice
- plutoisacomet
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Finding the surface flux of the sun
- Benzoate
- · Replies 8 ·
Very hot question(Answering will get you 5 dollars, just kidding.)
- NuclearEngineer
- · Replies 9 ·
Calculating Velocity and Acceleration of a Thrown Ball
- map7s
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Diameter of Football Players' Piston: Calculating
- pshla
- · Replies 1 ·
Applying Laws of Projectile Motion to 45 Degree Angle
- puni12
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Parallel R-L circuits, modeled motor
- Bradracer18
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Rolling cylinder with liquid center on accelerating conveyor belt
- skimmer
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Pressure of fluid on bottom of container
- faoltaem
- · Replies 3 ·
What Is the Depth and Pressure of Fluid in a Cylindrical Container?
- faoltaem
- · Replies 1 ·
What is the tension in an Atwood machine when one mass is infinitely large?
- jaded18
- · Replies 1 ·
A Problem Involving Kepler's Third Law
- ColdFusion85
- · Replies 4 ·
Squeegee drop and horizontal projectile motion formulas
- tdusffx
- · Replies 24 ·
Why do stretched rubber bands suddenly get shorter at high force?
- allyalt
- · Replies 3 ·
Calculating Temperature Increase of a Rubber Ball Dropped from a Building Roof
- rijo664
- · Replies 2 ·
Calculating Projectile Drop Distance for Supply Plane Delivery
- aligass2004
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Projectile Motion of rifle bullet
- aligass2004
- · Replies 9 ·
Calculating Angle for Accurate Shooting
- mathcrzy
- · Replies 5 ·
Car displacement after driving west then southwest
- mathcrzy
- · Replies 6 ·
From what height was the ball thrown?
- aligass2004
- · Replies 4 ·
How long does it take for the first hockey player to catch his opponent?
- willingtolearn
- · Replies 6 ·
How Do You Calculate Mass M1 in a Frictionless Pulley System?
- jeremy04
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What are the two possibilities for its x component problem?
- mathcrzy
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How Do You Calculate Relative Error in Mass Measurement?
- dewalken
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Understanding Vector Components of a Downward Facing Force
- ThomasHW
- · Replies 23 ·
How Do Wind and Plane Speeds Combine to Affect Ground Velocity?
- rossel
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What is the velocity after parachute opens?
- deuceszbigz
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Finding the range of Q for cable tensions under 270N
- twofish
- · Replies 12 ·
Finding T2 tension between blocks M2 and M3
- ttk3
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Solving Bullet Speed and Time in Gun Barrel
- Vaalron
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Drag racer velocity and acceleration
- deuceszbigz
- · Replies 5 ·
What is the greatest height above the ground that the sandbag reaches?
- Heat
- · Replies 20 ·
Ball thrown upward from 3.6 m window hits ground at same time as dropped ball
- w3tw1lly
- · Replies 15 ·
Solving 1D Motion: How Fast Must a Police Car Go to Catch a Holdup Car?
- Ashford
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How Do Two Balls Thrown at Different Speeds and Heights Meet?
- kppowell
- · Replies 1 ·
Postion-time graph and velocity
- xCanx
- · Replies 2 ·
Ball thrown upward and dropped ball at same height
- Pict
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What Misconceptions Exist About Net Force and Motion?
- Kalie
- · Replies 1 ·
Particle Position @t=0 to t=8 sec: I'm Wrong?
- Bluest731
- · Replies 1 ·
Kinematics in 2d and projectile velocity
- Mshah
- · Replies 1 ·
How Do Resultant Velocity Vectors Determine Sailboat Movement?
- ace214
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Once it hits the runway, how long till the Jet stops?
- therza7001
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Understanding Velocity Direction in Basic Physics Equations
- duki
- · Replies 6 ·
Average acceleration using vectors
- jperk980
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Don't know where to start-Uniform Circular Motion
- prelic
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How Do You Calculate the Release Point for an Air-Dropped Package?
- physicsgirlie26
- · Replies 11 ·
Resistance of each IDENTICAL resistor?
- itsagulati
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How High Does a Projectile Go When Fired from a Cannon?
- amlovatos
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Temperature at which ground state and first excited state have equal populations
- Benzoate
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Temperature increase of rubber ball from spring launch and bounce
- rijo664
- · Replies 7 ·
Work Done By a Gravitational Force
- xdarkelf714x
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Find the height from which the ball was thrown
- innightmare
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Finding the Apex of a Thrown Ball: Does Mass Matter?
- jasonalan
- · Replies 3 ·
Why does a 5V power supply drop to 3V when connected to a circuit?
- momomo_mo
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How do you calculate 1/Frequency?
- Jath
- · Replies 12 ·
Friction direction between two blocks against a wall
- neelakash
- · Replies 15 ·
Solving the Tension in Connected Objects with Masses m1 and m2
- staz87
- · Replies 16 ·
How Does Frequency Affect Electron Ejection in the Photoelectric Effect?
- Marghk
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Walking on Ice: Small Steps for Safety
- neelakash
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Understanding Double Refraction & Its Impact on Refractive Indices
- chaoseverlasting
- · Replies 1 ·
Solve Vector Physics Problem: Displacement, Velocity, & Acceleration
- btchrist24
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Static Equilibrium Ball Problem
- quintillaz
- · Replies 5 ·
Kinematics Problem Final speed of the sprinter.
- vertabatt
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What is the mass of the ball held steady by a horizontal force?
- BuBbLeS01
- · Replies 3 ·
Projectile motion of a tennis ball
- Idealism_Theory
- · Replies 8 ·
Understanding Conservative Forces in Physics
- livelife92
- · Replies 5 ·
Calculating the Force on a Helicopter in Flight
- BuBbLeS01
- · Replies 19 ·
Calculating Velocity of Mug Dropped from Counter
- innightmare
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Solving Hook's Law Problems with Gravity
- phillyj
- · Replies 5 ·
Calculating Forces on an Inclined Plane
- BuBbLeS01
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Electric Field of an Insulating Cylindrical Shell
- Winzer
- · Replies 20 ·
What does the area under a distance vs time graph represent?
- BlackWyvern
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Is Motion Always Positive or Negative in Physics Problems?
- willingtolearn
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Find vectors d1 and d2 from system of vector equations
- B-80
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How to Calculate the Angle Between a Vector and the Z-Axis?
- B-80
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Manufacturer of a 12V car headlight
- al8719
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Inclined Plane and sliding block
- BuBbLeS01
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For the following three vectors, what is 3C·(2A x B )?
- noeinstein
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Mailbag dropped from ascending helicopter at t=2.00s
- Vii
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Finding vector B when B + C equals a multiple of the y axis
- B-80
- · Replies 12 ·
What is the Force Exerted on a Parachutist During Free Fall Deceleration?
- Jacobpm64
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How Many Electrons Transfer to Equalize Charge Between a Plate and a Rod?
- gatorgrl1118
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Average force on a 55 kg dummy moving 0.81 m in crash test
- sheri1987
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Block pulled by cord at 15° angle: find speed after 3.9s
- BuBbLeS01
- · Replies 31 ·
Calculating Forces in Light Beam Interactions
- bob1182006
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Is this Wavelength answer correct?
- onrytxn
- · Replies 2 ·
Final Temp of Clay Homework: Find Change in Temp & Final Temp
- xpatelsxownage
- · Replies 15 ·
C=f(Lamda) n=c/v n1sine(theta1) = n2since(theta2)
- J-Wang
- · Replies 2 ·