Introductory Physics Homework Help Forum

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Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Physic tangential and Angular Acceleration
  • Ravin
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Natural force of circular motion
  • peweee17
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How Long Does It Take a Raindrop to Reach 63% of Its Terminal Velocity?
  • peweee17
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Aircraft approaching landing, vector, velocity, position problem. Help
  • raven2783
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E-field for a rectangle of charge
  • Xelotath
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A question about converting dimensions
  • MrEnergy
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Solving a Buoyancy Question - 6.4 N Weight in Water
  • abhs94
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How Much Force Does a Car Exert on the Road When Pulling a Trailer?
  • szszcool
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Rotational Kinematics-Bead Constrained in a Hoop Rotating
  • Darkalyan
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Model Airplane-Work-Energy Theorem and Kinetic Energy
  • pstfleur
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What is the Specific Heat of the Substance in This Calorimetry Problem?
  • Jeylan
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Inelastic collision at an angle with two cars
  • huh
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Inelastic collision at an angle
  • powerofsamson
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Newton laws object on incline in equlibrium
  • jwxie
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Equivalent circuit for non linear capasitor
  • EHT
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Where Is the Electric Field and Potential Zero for Two Point Charges on an Axis?
  • Shackleford
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Magnitude of Kinetic Frictional Force on Fireman Sliding Down Pole
  • lalalah
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Capacitors with partial dielectrics
  • clope023
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Thrush required to hover, take off and accelerate?
  • Robert Rice
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Coefficient of Friction on an Inclined Plane
  • Bamshakalaka
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Direction of Displacement Vector [2D Kinematics]
  • stickyriceyum
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The Work-Energy Theorwm and Kinetic Energy
  • pstfleur
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Max acceleration w/ a tension limit
  • j123
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Work and Kinetic Energy Problem
  • maniacp08
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Simple conservation of energy problem
  • ehilge
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Why do sprinters start in a crouched position?
  • pikapika1
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Kinetic energy and work energy thereom
  • amannaan2000
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Solving the Roller Coaster Speed Problem: A Max Speed of 20
  • theowne
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Calculating Contact Forces Between Three Blocks on a Frictionless Surface
  • robvba
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Calculating Horizontal Distance of a Dropped Package from a Flying Plane
  • knelson
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Force needed to keep block from moving on frictionless triangular block
  • Strukus
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What's the Resistance in a Circular Pan with a Metal Disk?
  • kjintonic
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Solve Spring Oscillation: Find Max Speed & Kinetic Energy
  • isaacsquared
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How Do You Solve Projectile Motion Problem #2?
  • phys1618
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How Old is My Age? Solving an Introductory Question with Variables
  • pikapika1
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Solving for Closest Approach: 2D Kinematics Help and Solutions
  • Kudo Shinichi
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Frictional and Tensional Forces on an Inclined Plane
  • parabolic
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Find equation of path of a point mass under influence of 2 central forces
  • taureau20
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Electric field at the center of a square
  • ally1h
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Kinematics. cannonball was dropped- how far from the wall does it hit ground?
  • aurorabrv
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What Is the Acceleration of a Water Balloon Thrown Downward?
  • phys1618
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Use either trigonometry or components to find displacement
  • aurorabrv
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Inclined plane and normal reaction force
  • robvba
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Projectile motion- acceleration due to gravity on the moon
  • aurorabrv
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24K
Basketball projectile motion problem
  • Maiia
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Calculating Rain Velocity in Different Reference Frames for a Traveling Car
  • kornkidcrazy
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What Is the Charge on Earth Producing Its Electric Field?
  • jrzygrl
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Mechanics Problem Involving Newton's Laws
  • OpticalFreeze
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What is the question looking for?
  • I_LuV_FiZiX
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Are Your Physics Problem Solutions on Forces and Motion Correct?
  • musicfairy
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Maximum Height of Projectile Using Cons. of Energy
  • akbro93704
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Car rolling down hill 2-D motion problem
  • Maiia
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Calculating Charge in a Ring of Charge
  • jaejoon89
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Earth's gravitational field strength
  • D4b34r5
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Pick the statement which correctly describes the acceleration
  • I_LuV_FiZiX
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Newton's Three Laws (moving a box)
  • southernbelle
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How Do You Calculate the Weight on a Suspended Board in Static Equilibrium?
  • akan
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Pendulem in an Accelerting Plane
  • BrettL789123
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M1 Mass on Pulley: Calculate ms-mk
  • BrettL789123
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Interference/Diffraction Shadows
  • Aeighme
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How to Calculate Kinetic Energy Percentage in Non-Elastic Collision?
  • kbeyer
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Critical Angle Prism: Find Theta with n=1.90
  • Aeighme
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Determine the frequency of the resulting motion
  • akan
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Static equilibrium of window cleaner
  • brookbj
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How do you find threshold frequency? (given wavelength and KE of electrons)
  • fizzicsdummy
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Projectile motion- height of building
  • Maiia
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What Should Be the Banking Angle for a Curve Negotiated Without Friction?
  • lpcampbe
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Projectile Motion: Calculating Time to Shoot a Flying Bird
  • fishingspree2
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Simplifying:t \approx 0.34 secondsCalculating Hang Time for Vertical Jump
  • mandaa123
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Find direction of initial velocity of nonrelativistic particle in B
  • Quelsita
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What Is the Correct Slit Width for X-Ray Diffraction with a 10A Wavelength?
  • Quelsita
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A quick projectile motion problem. Please help me Thanks
  • Miss1nik2
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2-D motion: projectile motion of football
  • Maiia
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Work Done by Horse in 11.8 min: 190904 N*m
  • Trousers
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How Does a Compass React to a Current-Carrying Wire?
  • demonhunter19
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Finding Thrust from aircraft, need rolling friction
  • jheld
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Calc based physics spring problem
  • isaacsquared
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Coulomb's Law (Finding the force due to two other charge, not only one)
  • daimlerpogi
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How Do You Calculate the Launch Velocity Components in a Football Field Goal?
  • Miss1nik2
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Current through parallel plate capacitor vibration sensor
  • HappMatt
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What Angle of Incidence Causes Total Reflection of X-rays in Calcite?
  • Quelsita
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How High Can a Salmon Jump if It Leaps at 2.5 Meters Per Second?
  • mandaa123
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What Height Does a Ball Reach When Its Speed Halves?
  • mandaa123
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Group and Phase velocity of wave packet
  • Quelsita
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How can I find the velocity and acceleration of a particle in 2-dimensions?
  • Filenes
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What is the tension in the suspended cord when masses are released?
  • Ltcellis
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Projectile Motion: Calculating Initial Velocity for Grenade Throw in Action Film
  • limekiwi
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Torsional Oscillations Question
  • akan
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Applications of Newton's Laws of Motion
  • pstfleur
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Why is the electric field infinite at the location of a charge?
  • ayestaran1
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What is the Smallest Coefficient of Friction Between Crutches and Ground?
  • Husker70
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Does the ball clear the net? Please help, thanks in advance?
  • reverse
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Amplitude of sound wave in by 50%
  • hemetite
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How Can You Calculate Jupiter's Radius Using Europa's Orbital Data?
  • brookbj
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Finding the Net Direction and Speed of a Boat
  • 964js7
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Parllel Plate Capacitors Connected Opposite
  • Fizzicist
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Highest harmonic of a string within typical human's audible range
  • hemetite
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Circular Motion of a 8.0cm CD: Finding Speed and Revolution Using Kinematics
  • reverse
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Help Projectile Motion- Firing of a gun
  • fewill
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Tension in Rope: Truck Towing 1T Car Up Hill
  • milo7979
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