Introductory Physics Homework Help Forum

Post thread
Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Heres a highschool physics question thats got my g/f stumped Need help
  • · Replies 10 ·
Replies
10
Views
7K
Calculating Friction Force on 18.8kg Box on 38° Incline
  • · Replies 1 ·
Replies
1
Views
4K
Calculating Mass and Weight of a Planet
  • · Replies 2 ·
Replies
2
Views
4K
Vertical spring energy transformation
  • · Replies 3 ·
Replies
3
Views
11K
AP Test Problems: Solutions and Checks for Fatty Packet Questions
  • · Replies 3 ·
Replies
3
Views
5K
Solving Dynamics Problem: Tension & Friction w/ 3 Blocks
  • · Replies 5 ·
Replies
5
Views
2K
How Do You Calculate the Mass of a Cart in a Momentum Problem?
  • · Replies 4 ·
Replies
4
Views
4K
Mean Free Path: Definition, Impact of Size & Density
  • · Replies 1 ·
Replies
1
Views
4K
Why Are Initial Conditions x(0) and v(0) Preferred Over a(0) in ODE Solutions?
  • · Replies 1 ·
Replies
1
Views
2K
Horribily Interesting Measurement Qns
  • · Replies 3 ·
Replies
3
Views
2K
Relationship between velcity, wavelength, and frequency
  • · Replies 8 ·
Replies
8
Views
18K
Rolling with and without slipping
  • · Replies 6 ·
Replies
6
Views
13K
Will Changing the Air Column Length in a Pipe Create Resonance in Helium?
  • · Replies 5 ·
Replies
5
Views
8K
What Is the Total Stretch When Two Springs Are Combined?
  • · Replies 3 ·
Replies
3
Views
8K
Identifying Unknowns in a circuit
  • · Replies 1 ·
Replies
1
Views
2K
Sound wave spreading radially question
  • · Replies 3 ·
Replies
3
Views
3K
Solving the Pressure Change in a Gas Experiment
  • · Replies 5 ·
Replies
5
Views
4K
Linear RPM vs Time = ? Horsepower
  • · Replies 6 ·
Replies
6
Views
6K
Treating parallel electromagnets as current carrying wires.
  • · Replies 6 ·
Replies
6
Views
3K
What is the output of a photodiodes?
  • · Replies 6 ·
Replies
6
Views
23K
How Do You Calculate Object Fall Times with Air and Water Resistance?
  • · Replies 13 ·
Replies
13
Views
6K
Whats the characteristics of a photodiode?
  • · Replies 4 ·
Replies
4
Views
8K
Are Seatbelts a Danger to Safety?
  • · Replies 6 ·
Replies
6
Views
3K
Can the Coefficient of Expansion Be Expressed in Both Kelvin and Celsius?
  • · Replies 3 ·
Replies
3
Views
4K
What is the Derivation for Pressure at the Centre of a Star?
  • · Replies 2 ·
Replies
2
Views
5K
Find tension of a string on the ceiling of an elevator
  • · Replies 10 ·
Replies
10
Views
20K
Need tutorial of interference between two waves
  • · Replies 1 ·
Replies
1
Views
2K
How Efficiently Can a 500 Watt Motor Heat Water?
  • · Replies 10 ·
Replies
10
Views
10K
Is the Solution to the Equivalent Impedance Problem Correct?
  • · Replies 1 ·
Replies
1
Views
5K
How Does Velocity Magnitude Affect Circular Motion?
  • · Replies 8 ·
Replies
8
Views
3K
Specific Heat Capacity Problem.(Please check.)
  • · Replies 2 ·
Replies
2
Views
22K
Solve for Displacement in Harmonic Oscillator
  • · Replies 3 ·
Replies
3
Views
3K
Understanding Circular Motion: Force and Velocity in Orbits Explained"
  • · Replies 4 ·
Replies
4
Views
3K
Which Brick Is Harder to Keep in Place: Brick A or B?
  • · Replies 9 ·
Replies
9
Views
5K
What are the resonance heights for a tuning fork and resonance tube experiment?
  • · Replies 4 ·
Replies
4
Views
8K
Magnetic Compass Needle: Remanence & Airgap Effects on AC Performance
  • · Replies 19 ·
Replies
19
Views
5K
Understanding L-C-R Circuits: Can Voltages Exceed the Source? | Explained
  • · Replies 5 ·
Replies
5
Views
8K
Young Experiment: Why is Central Fringe Always Bright?
  • · Replies 1 ·
Replies
1
Views
2K
Pedestrian Accident at Traffic Crossing: Witness Testimony and Accident Analysis
  • · Replies 1 ·
Replies
1
Views
3K
Electrical field at the center of a hemisphere
  • · Replies 2 ·
Replies
2
Views
4K
Help with centre of mass please
  • · Replies 4 ·
Replies
4
Views
2K
Apparent Magnitude of Sun at 8000 Parsecs from Galactic Center
  • · Replies 1 ·
Replies
1
Views
3K
Finding the mass of stars that evolved away.
  • · Replies 5 ·
Replies
5
Views
3K
Calculating wavelengths of photons / photospheric temperatures
  • · Replies 3 ·
Replies
3
Views
4K
Problem dealing with a chapter on relativity
  • · Replies 6 ·
Replies
6
Views
6K
What is the uncertainty in its mass?
  • · Replies 11 ·
Replies
11
Views
5K
Calculate AC Circuit Power: Toaster 3A, 240V, 50Hz
  • · Replies 3 ·
Replies
3
Views
2K
Solving Quantum Questions with Bohr's Theory
  • · Replies 1 ·
Replies
1
Views
4K
Voltage Ambiguity: Alternating Currents HW
  • · Replies 1 ·
Replies
1
Views
2K
Spacecraft Traveling Past Space Station: Length and Radio Signal Timing
  • · Replies 2 ·
Replies
2
Views
2K
What is the Impact Angle Equation for Colliding Objects at an Angle?
  • · Replies 4 ·
Replies
4
Views
2K
Calculating Initial Velocity of Object Connected to Wall by Spring
  • · Replies 10 ·
Replies
10
Views
3K
Plane landing on barge (momentum)
  • · Replies 4 ·
Replies
4
Views
5K
Will a Compressive Force Bend a Bimetallic Rod Toward Brass or Copper?
  • · Replies 1 ·
Replies
1
Views
4K
What is the average power in accelerating this car
  • · Replies 2 ·
Replies
2
Views
4K
What Is the Prism Made Of Given Its Apex Angle and Minimum Deviation?
  • · Replies 2 ·
Replies
2
Views
2K
How Steep a Hill Can You Park a Car With Static Friction of 0.8?
  • · Replies 3 ·
Replies
3
Views
8K
How does a wave move along a rope?
  • · Replies 13 ·
Replies
13
Views
4K
Calculating Horsepower/Torque from Acceleration/Mass
  • · Replies 4 ·
Replies
4
Views
14K
Easy rotational motion question?
  • · Replies 5 ·
Replies
5
Views
2K
Estimate Spring and Damping Constants of 1700kg Automobile
  • · Replies 1 ·
Replies
1
Views
9K
Calculate Force F at Point B for Slider along Guide
  • · Replies 2 ·
Replies
2
Views
2K
Homework: conservation of momentum
  • · Replies 10 ·
Replies
10
Views
4K
How Can the Linear Density be Determined Experimentally in Melde's Lab?
  • · Replies 2 ·
Replies
2
Views
2K
Calculating Decay Lifetime of Unstable Isotope
  • · Replies 3 ·
Replies
3
Views
5K
Investigating Beat Frequency in Pipes with Different Temperatures
  • · Replies 3 ·
Replies
3
Views
6K
How Do You Calculate the Change in Momentum of a Billiard Ball?
  • · Replies 5 ·
Replies
5
Views
6K
Planck's Formula - Help undressing the question needed
  • · Replies 2 ·
Replies
2
Views
3K
Calculating the age of a radioactive source
  • · Replies 9 ·
Replies
9
Views
8K
Confusion regarding sin and cos
  • · Replies 3 ·
Replies
3
Views
19K
Solve Physics 12 Help Problems: Change in Momentum & Diagrams
  • · Replies 1 ·
Replies
1
Views
4K
How Deep Must a Steel Ball Sink in Oil to Reach Velocity v?
  • · Replies 1 ·
Replies
1
Views
6K
Determining the Speed of a Car from Skid MarksHow fast was the car going?
  • · Replies 2 ·
Replies
2
Views
11K
Understanding Capacitance: Answers to Common Questions Explained
  • · Replies 3 ·
Replies
3
Views
3K
Ideal gas pressure to net force
  • · Replies 3 ·
Replies
3
Views
4K
How Do I Calculate Time to Lift an Object with Given Force, Mass, and Height?
  • · Replies 8 ·
Replies
8
Views
3K
How to Calculate Acceleration of a Proton in a Magnetic Field
  • · Replies 4 ·
Replies
4
Views
11K
Calculating Final Velocity with Acceleration and Normal Force
  • · Replies 12 ·
Replies
12
Views
3K
Very simple high school phisics question
  • · Replies 3 ·
Replies
3
Views
4K
Plotting Resolution Against Lux in Excel
  • · Replies 2 ·
Replies
2
Views
3K
How Does Current Flow in a Circuit According to Kirchhoff's Law?
  • · Replies 6 ·
Replies
6
Views
4K
Explaining Newton's First Law & the Dropped Weight Trolley
  • · Replies 35 ·
2
Replies
35
Views
5K
Differential equation- (haven't had any courses on diff. equations yet
  • · Replies 14 ·
Replies
14
Views
3K
Solving a Heat/Energy Problem: Final Temp of Steam
  • · Replies 3 ·
Replies
3
Views
2K
Calculating Wave Velocity with Frequency and Amplitude
  • · Replies 4 ·
Replies
4
Views
7K
Magnetic Flux and Pole Definition
  • · Replies 2 ·
Replies
2
Views
2K
Interference & Diffraction Questions
  • · Replies 1 ·
Replies
1
Views
2K
What is the Power Output of a Bird's Song?
  • · Replies 5 ·
Replies
5
Views
3K
Electric force distance problem
  • · Replies 13 ·
Replies
13
Views
5K
Preparing for a Career in Electrical Work: Sample Physics 11 Questions
  • · Replies 7 ·
Replies
7
Views
2K
F=ma, what is m actually means?
  • · Replies 7 ·
Replies
7
Views
12K
Velocity of the water flowing through the pipe
  • · Replies 14 ·
Replies
14
Views
3K
The Strong Nuclear Force: Increasing with Distance?
  • · Replies 4 ·
Replies
4
Views
2K
Find Sweet Spot for Elastic Collision w/ Rod of Mass M & Length L
  • · Replies 2 ·
Replies
2
Views
4K
How Does Changing Tension Affect Standing Wave Patterns and Antinode Formation?
  • · Replies 3 ·
Replies
3
Views
32K
Is there a Doppler effect when sound source and object move at right angles?
  • · Replies 9 ·
Replies
9
Views
4K
Calculating Earth's Absorbed Solar Power Using Stefan's Law
  • · Replies 4 ·
Replies
4
Views
11K
Understanding the Vis-Viva Equation for Elliptical Orbits
  • · Replies 1 ·
Replies
1
Views
2K
Wes's Big Exam Thread - 3 Hours of Physics Fun
  • · Replies 9 ·
Replies
9
Views
3K
Just translating the question.
  • · Replies 2 ·
Replies
2
Views
2K