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.
A thin vertical rod sliding until it hits a lump of putty and rotates.
  • volleygirl292
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What is the angular displacement of a thrown ball
  • ashezb
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4
Simultaneous events in different frames of reference
  • Kyrios
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6
Conceptual Questions Lenz's Law, Solenoid
  • devilaudy
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3
Condensed Matter: Thermal Expansion coeff. using diffraction angles
  • themongrelcat
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Meaning of gradient and intercept
  • kingstar
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Center of mass of a slender rod with variable density
  • jonjacson
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2
What Is the Average Kinetic Energy of a Nitrogen Molecule at 25°C?
  • M9501
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Height difference in liquids with different densities.
  • zeralda21
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Questions Considering General Circuits
  • SDPY15
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Understanding AC Power: Maximum and Minimum Currents on Resistor and Inductance
  • 0fibonacci1
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2
Conducting sphere connected to the ground
  • Saitama
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5
What is the Efficiency of a Cyclic Process?
  • Saitama
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Photoelectric effect, mercury vapor lamp
  • korky0429
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How Do Sound Waves Interfere in Dual Speaker Setups?
  • chinnie15
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3
Kinetic energy efficiency question
  • 13physicsdude
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4
Calculating Power and Horsepower for an Aerodynamic Car at 25m/s
  • questionasker1
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7
Calculating Mass Flow Rate of Nitrogen at 0.3m^3/s
  • chartlieb01
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Constant acceleration in a straight line with variable distances
  • yonewt
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7
Calculating Average Force on Walls from Bouncing Ball Collisions
  • Saitama
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9
The electric field formed by a uniformly polarized cylinder
  • SadStudent
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3
Recommended reading list for secondary school student
  • TKZoroSantoryu
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1
Electric field due to a hollow, charged cylinder
  • chipotleaway
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6
How Much Energy Does It Take to Move a Charge to the Apex of a Charged Cone?
  • utkarshakash
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10
Force on Dielectric Medium in the Presence of Point Charges
  • Saitama
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10
To which natural frequency does wavelength equal to L1
  • jorgegalvan93
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1
What Happens to Angular Velocity When a Disc is Dropped onto a Rotating Hoop?
  • boognish
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4
Calculating Length Change of Heated Copper Rod
  • Dantheman1
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3
Kinematics Problem Homework Help
  • mpoole
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2
E-field from Time Varying B-field of Current wire
  • kalashbhatt
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1
Momentum Question: Asteroid Collision
  • student34
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2
Net force of two forces in a ring
  • ShizukaSm
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2
Experiment Suggestions For Friction and Momentum
  • physicsguru97
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1
Calculating Net Electric Flux in a Cylindrical Solid of Charge - Homework Help
  • asdf12312
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Conservation Of Energy With Friction
  • cheese_whizz
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6
Magnitude of force one crate exerts on another (both touching)
  • bp789
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Minimum thickness n/wavelength equation?
  • asdf12312
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How can I represent a double pendulum system using matrices?
  • CAF123
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9
What could cause data to linearize at a higher power than it should?
  • djh101
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5
Calculating Strain Energy in a Hanging Spring
  • Nemo's
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9
Please help - Efficiency of car engine question Unit test tomorrow
  • 13physicsdude
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2
What is the weight of a 1500 kg car on Planet X?
  • cmNickoli7
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Parallel Springs subject to load
  • pige
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4
Using relative motion (2D) to get rain speed & direction when running
  • aaronstonedd
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2
Torque and Moment of Inertia of a soda can
  • hannah668
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2
Universal gas constant for 1 kg oxygen
  • Ezio3.1415
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3
Find the Force to move 2 objects, and force between the 2
  • lemonade
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5
Calculating Capacitor Oscillations on a Conductive Spring
  • skrat
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16
Problem involving Newton's second law
  • Clever_name
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4
Angular momentum as a function of time question
  • goli12
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Question related to motion / kinematics
  • hasnainzeenwa
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3
What is the Electric Potential at a Point on the Surface of a Charged Sphere?
  • utkarshakash
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5
Does Static Equilibrium Necessitate Zero Velocity?
  • whitehorsey
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How Long Does It Take for One Rocket to Pass Another at Relativistic Speeds?
  • ZanyCat
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Is the Charge Positive or Negative in This Electric Field Scenario?
  • Nerkiot
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Proportions in circular motion don't make sense.
  • Scorpius
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Integral of non-constant acceleration
  • Karol
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Finding acceleration of cylinder
  • Saitama
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Where does Gravitation equals zero?
  • Sapphiretwirl
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Charge entering and leaving a light bulb
  • iriver4
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HELP Two point source interference pattern
  • redbluegreen
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Work equation for electrostatics and electricity
  • Benny851
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How Do You Calculate Torsion Spring Parameters?
  • freshcoast
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3
Solving a Weird Optics Question: IIT-JEE 1991 Problem Explained
  • jaumzaum
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Mass-spring system in SHM concept question
  • freshcoast
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Find Unknown Variables a, b, c in V=abc Equation | Volume 512cm^3
  • besfort
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Help with Moment Calculation Problem
  • bostonfenway
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Physics help problem-component force and finding X distance?
  • physicsman1234
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How to calculate a harmonic of a square wave
  • bigfattyfatfat
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What is the PSI needed to lift me at an acceleration of 1m/s/s?
  • daviddjh
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Average acceleration from average velocity?
  • Fizz_Geek
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Finding separation of bright spots
  • omc1
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Calculating Escape Velocity of Mars from the Sun's gravitational field
  • QuickSkope
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Answer: Torque of Swallow on 40 N Rod with 1 m Length
  • Nirupt
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Torque with sign attached to a rod
  • Painguy
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What is Not Directly Proportional to Current Density in the Drude Model?
  • timothyhenry
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The Bouncing Ball: Understanding Energy Conservation
  • EricPowell
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4
Finding Frictional force from the magnetic equation Fb=BIL
  • aldoftybg
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Transistor load and saturation problem
  • septentriones
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Index of Refraction Concept - Extremely Confusing
  • riseofphoenix
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Charge surrounded by charged conducting sphere
  • iriver4
  • · Replies 8 ·
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8
How Does Friction Affect Energy Conservation in Rotational Motion Experiments?
  • Painguy
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Maximum acceleration of a front-wheel drive car
  • Kaevan807
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Strain potential energy and efficiency question
  • Dongorgon
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Circuit Analysis - Laplace notation
  • anol1258
  • · Replies 17 ·
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Stressed about Physics Exam Help with refractive index concept
  • riseofphoenix
  • · Replies 8 ·
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8
How to solve circuit analysis problems with multiple loops?
  • Questions999
  • · Replies 21 ·
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Finding impedance that is unit step function
  • anol1258
  • · Replies 6 ·
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6
Calculating induced charges by a charge between two capacitor plates.
  • anirudhsharma1
  • · Replies 21 ·
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Calculate force acting on a Rod with constant mass and varying length
  • rashboosh
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Simple Capacitor System Question
  • NoranPrease
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3
Calculate the amount of heat added to the ideal monatomic gas
  • Tab Caps
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Planar kinematics of rigid bodies
  • tamtam402
  • · Replies 8 ·
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Rolling, Both Slipping and Nonslipping
  • cbasst
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6
How Do You Prove Constructive Interference Mathematically?
  • hyddro
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Where is the friction for the following situations?
  • jeevankasin
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Graphical analysis of a spring mass system over a function of time
  • freshcoast
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5
Inclined plane with friction and external force
  • verhooverhoven
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Relative momentum, Rest Energy, Kinetic energy and speed of a proton
  • cyugsi2
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How can conservation of energy be applied to solve a spring collision problem?
  • freshcoast
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