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.
Elevator Problem: What is the Normal Force Acting on a Person?
  • · Replies 14 ·
Replies
14
Views
3K
Charges in Magnetic Fields from Surfing Physics book
  • · Replies 5 ·
Replies
5
Views
2K
The strength of induced electric field
  • · Replies 18 ·
Replies
18
Views
2K
Net Force acting on block on incline
  • · Replies 1 ·
Replies
1
Views
2K
Calculating work of Otto cycle stages - Thermodynamics.
  • · Replies 1 ·
Replies
1
Views
3K
Energy and Momentum [Spring (word problem)]
  • · Replies 3 ·
Replies
3
Views
2K
Net Positive Charge on 1km Power Line
  • · Replies 17 ·
Replies
17
Views
2K
How do I use the number of oscillations given?
  • · Replies 18 ·
Replies
18
Views
3K
Speed of Sound using a Resonant tube
  • · Replies 12 ·
Replies
12
Views
4K
What Is Incorrect About Grounding in Electromagnetic Theory?
  • · Replies 20 ·
Replies
20
Views
9K
Velocity of particle leaving wedge
  • · Replies 12 ·
Replies
12
Views
2K
Find the velocity of block a using vector method.
  • · Replies 6 ·
Replies
6
Views
2K
Opamp Circuit: Finding Voltage at Resistor and Power Supplied
  • · Replies 9 ·
Replies
9
Views
2K
What Force Acts Between Hemispheres of a Charged Soap Bubble?
  • · Replies 14 ·
Replies
14
Views
5K
By how much is each post compressed?
  • · Replies 5 ·
Replies
5
Views
2K
Energy of the photon emitted in a gamma ray decay
  • · Replies 19 ·
Replies
19
Views
3K
Inclined plane - a small sphere, a big sphere and a cylinder
  • · Replies 13 ·
Replies
13
Views
2K
Potential energy by concentric shells
  • · Replies 1 ·
Replies
1
Views
2K
Field due to ring charge at x-y axis.
  • · Replies 5 ·
Replies
5
Views
2K
Help in Homework - Kinetic Energy
  • · Replies 5 ·
Replies
5
Views
2K
Conservation of Angular Momentum with SHM
  • · Replies 8 ·
Replies
8
Views
3K
What Is the Minimum Coefficient of Friction for a Tilted Cube?
  • · Replies 3 ·
Replies
3
Views
2K
How Does Impulse Affect Acceleration and Tension in a Disk-Particle System?
  • · Replies 30 ·
2
Replies
30
Views
5K
Calculating the angle of a double-slit experiment
  • · Replies 14 ·
Replies
14
Views
6K
Stuck on separable equation relating to moment of inertia
  • · Replies 7 ·
Replies
7
Views
1K
Stuck on an Electrical Potential Energy Question
  • · Replies 4 ·
Replies
4
Views
2K
How Can I Estimate Neutron Energy in an Elastic Collision with an Oxygen Atom?
  • · Replies 1 ·
Replies
1
Views
1K
Work, Gravitational Potential and Kinetic Energy, Spacecraft
  • · Replies 6 ·
Replies
6
Views
3K
How to linearise this equation for experiment?
  • · Replies 9 ·
Replies
9
Views
3K
Calculating Final Pressure for a Metal Undergoing Temperature and Volume Changes
  • · Replies 1 ·
Replies
1
Views
2K
How to Determine Centroid of Gate Hydrostatics
  • · Replies 2 ·
Replies
2
Views
3K
Understanding an equation in a dynamics spring problem
  • · Replies 4 ·
Replies
4
Views
2K
Floating 9cm Post: Solving Submersion Depth
  • · Replies 20 ·
Replies
20
Views
3K
Calculating Spring Constant From Plot of T^2 versus r^2
  • · Replies 4 ·
Replies
4
Views
2K
How Does Wind Turbine Blade Length Affect Power Output?
  • · Replies 2 ·
Replies
2
Views
2K
Moments of Inertia: Hi, Need Help Understanding?
  • · Replies 1 ·
Replies
1
Views
2K
Force needed for hole punch in Metal
  • · Replies 1 ·
Replies
1
Views
2K
Special Relativity Conceptual Question
  • · Replies 4 ·
Replies
4
Views
3K
Problem with Energy Dissipation
  • · Replies 5 ·
Replies
5
Views
6K
Dynamics exam prep -- forces explanation in FBD please
  • · Replies 2 ·
Replies
2
Views
2K
Stuck on projectile motion problem using gravitational force
  • · Replies 25 ·
Replies
25
Views
4K
Oscillation in a hole through the Earth (hole is offset)
  • · Replies 2 ·
Replies
2
Views
2K
Find maximum acceleration given the displacement equation
  • · Replies 11 ·
Replies
11
Views
5K
Spring elastic potential, removing mass
  • · Replies 6 ·
Replies
6
Views
2K
Understanding free-body diagram: Circular Hoop
  • · Replies 9 ·
Replies
9
Views
2K
Volume of 410kg Bluefin Tuna at 15m Depth: 41854 m3
  • · Replies 9 ·
Replies
9
Views
3K
How Does Friction Affect Spring Compression in a Bullet Collision?
  • · Replies 13 ·
Replies
13
Views
5K
Conceptual question with Concentric Shell Potental
  • · Replies 1 ·
Replies
1
Views
1K
What's the Velocity at the Highest Point of a Swing?
  • · Replies 10 ·
Replies
10
Views
2K
Is the AP Physics 1 textbook flawed in its explanation of moment of inertia?
  • · Replies 5 ·
Replies
5
Views
2K
Gravitational Force in terms of Density?
  • · Replies 7 ·
Replies
7
Views
4K
Height of falling object vs. compression of spring
  • · Replies 1 ·
Replies
1
Views
2K
Explaining the Concepts of Force and Energy
  • · Replies 4 ·
Replies
4
Views
2K
Basic trigonometry in dynamics force problem
  • · Replies 3 ·
Replies
3
Views
3K
Trouble with 2 step velocity transformation in SR
  • · Replies 17 ·
Replies
17
Views
2K
Calculating the energy of anti neutrino
  • · Replies 10 ·
Replies
10
Views
4K
Calculate angular velocity of a ball rolling down incline?
  • · Replies 6 ·
Replies
6
Views
6K
Pulling a puck through the hole
  • · Replies 7 ·
Replies
7
Views
2K
What Is the Correct Source Voltage Amplitude for Desired Power in an AC Circuit?
  • · Replies 19 ·
Replies
19
Views
6K
Conservation of Momentum Problem
  • · Replies 1 ·
Replies
1
Views
1K
Statics and Rotational Dynamics
  • · Replies 16 ·
Replies
16
Views
2K
How to find the magnitude of the acceleration given F, kF, m
  • · Replies 5 ·
Replies
5
Views
2K
Find the change in height of a bridge
  • · Replies 3 ·
Replies
3
Views
2K
Calculating Velocity at the Bottom of a Quarter Circle Track
  • · Replies 8 ·
Replies
8
Views
3K
Error Transmission (Moment of Inertia)
  • · Replies 4 ·
Replies
4
Views
2K
Coefficient of performance of refrigerator
  • · Replies 2 ·
Replies
2
Views
6K
Time required for disk to reach angular speed?
  • · Replies 11 ·
Replies
11
Views
3K
Number of modes in optical fiber
  • · Replies 1 ·
Replies
1
Views
2K
Finding magnitude of two charge given midpoint
  • · Replies 1 ·
Replies
1
Views
2K
Understanding Internal Energy Changes in Phases of Water
  • · Replies 8 ·
Replies
8
Views
3K
Trying to solve conservation of momentum problem
  • · Replies 14 ·
Replies
14
Views
3K
Find Absolute Magnitude, distance and "T" of binary star system
  • · Replies 10 ·
Replies
10
Views
3K
Ratio of rotational inertias for belt-connected wheels
  • · Replies 7 ·
Replies
7
Views
4K
What is the relationship between power in watts and power in dBW?
  • · Replies 11 ·
Replies
11
Views
3K
How to calculate the tension in a beam of a bridge?
  • · Replies 29 ·
Replies
29
Views
9K
Girl on a swing, find tension and force
  • · Replies 32 ·
2
Replies
32
Views
12K
The minimum KE required for muons to travel a given distance
  • · Replies 10 ·
Replies
10
Views
2K
Frictionless ring sliding on circle in constant acceleration
  • · Replies 16 ·
Replies
16
Views
2K
How Is Torque Calculated in a Wrecking Ball Scenario?
  • · Replies 9 ·
Replies
9
Views
3K
Was the Second Driver Speeding in the Collision?
  • · Replies 10 ·
Replies
10
Views
2K
Magnitude of net Gravitational Force
  • · Replies 1 ·
Replies
1
Views
5K
Equilibrium of Charges at Circumference of a Circle
  • · Replies 5 ·
Replies
5
Views
2K
Writing Kirchhoff Rules for a Multi-Loop Circuit
  • · Replies 5 ·
Replies
5
Views
4K
Frequency of Vibration of Two Masses Joined by a Spring
  • · Replies 15 ·
Replies
15
Views
3K
Buoyancy: 3 solid things have a different position in the water
  • · Replies 12 ·
Replies
12
Views
2K
When is Conservation of angular momentum valid?
  • · Replies 9 ·
Replies
9
Views
2K
Forces due to atmospheric pressure won't cancel in an open tank
  • · Replies 13 ·
Replies
13
Views
3K
Heat transfer. Could anyone explain the solution?
  • · Replies 3 ·
Replies
3
Views
2K
Conserving Momentum for Rocket Engines
  • · Replies 10 ·
Replies
10
Views
3K
Will a 27N Push Move a 50kg Object on a Surface with 0.6 Static Friction?
  • · Replies 3 ·
Replies
3
Views
2K
Solving KVL in a Multiloop Circuit with Battery & LC Circuits
  • · Replies 18 ·
Replies
18
Views
2K
Final Temperature of a Lightbulb filament
  • · Replies 5 ·
Replies
5
Views
4K
Retarding impact force when object impacts stationary object
  • · Replies 10 ·
Replies
10
Views
2K
Solving John's Elevator Problem: Acceleration & Time/Distance
  • · Replies 11 ·
Replies
11
Views
2K
Solve Horizontal Spring Homework: T, A, V&Where Max V
  • · Replies 5 ·
Replies
5
Views
2K
After 14ms the current drops -- Find the capacitance at C
  • · Replies 4 ·
Replies
4
Views
1K
Pile Driver Energy Homework: Calculate Change in PE
  • · Replies 6 ·
Replies
6
Views
5K
Two Capacitors connected in Series and to a 10V battery.
  • · Replies 4 ·
Replies
4
Views
4K
How Does Induced Current Vary in a Metal Coil Within a Magnetic Field?
  • · Replies 16 ·
Replies
16
Views
2K
What is the question really asking? Just understanding the question
  • · Replies 3 ·
Replies
3
Views
2K