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.
Calculating Trajectory Equation of Motion for a Rock Touching a Wall
  • · Replies 32 ·
2
Replies
32
Views
2K
Two charged spheres hitting each other
  • · Replies 7 ·
Replies
7
Views
2K
Significant Figures Verification
  • · Replies 1 ·
Replies
1
Views
1K
Find acceleration of Moving incline with a block on it
  • · Replies 11 ·
Replies
11
Views
3K
Find the tension in the two strings
  • · Replies 7 ·
Replies
7
Views
2K
Use the energy method to find the distance moved by particle
  • · Replies 1 ·
Replies
1
Views
1K
Change in Angular Velocity While Orbiting With No Torque
  • · Replies 30 ·
2
Replies
30
Views
3K
Calculating Ion Distance in a 1D Lattice: A Simple Solution
  • · Replies 5 ·
Replies
5
Views
1K
Finding acceleration from Velocity vs Position graph
  • · Replies 2 ·
Replies
2
Views
4K
Intermediate axis theorem (Tennis racket theorem)
  • · Replies 3 ·
Replies
3
Views
2K
Pressure inside the zeppelin for it to float
  • · Replies 8 ·
Replies
8
Views
3K
Calculating the motion of air cylinder
  • · Replies 5 ·
Replies
5
Views
1K
Understanding the Bungee Jumper Problem: Energy Transformation and Calculations
  • · Replies 44 ·
2
Replies
44
Views
6K
Masses colliding due to gravitational attraction
  • · Replies 2 ·
Replies
2
Views
2K
Satellite mechanics: linear and rotational momentum
  • · Replies 35 ·
2
Replies
35
Views
3K
What is the minimum time at a given angle on a cone with constant size?
  • · Replies 18 ·
Replies
18
Views
2K
Ring Impedance & String Connection: Is It Valid?
  • · Replies 5 ·
Replies
5
Views
1K
Problem related to Archimedes' Principle and Buoyancy
  • · Replies 22 ·
Replies
22
Views
2K
Angular deceleration of a circular saw blade
  • · Replies 4 ·
Replies
4
Views
1K
Acceleration of a suitcase in an accelerating train after getting pushed
  • · Replies 5 ·
Replies
5
Views
1K
Maximizing Ladder Stability: Understanding the Principle of Moments
  • · Replies 9 ·
Replies
9
Views
1K
Calculating the Center of Mass of a Uniform Thin Hoop Using Symmetry
  • · Replies 7 ·
Replies
7
Views
1K
Q：Hydrostatic Pressure vs. Energy Conservation Equation
  • · Replies 21 ·
Replies
21
Views
2K
What Causes the Different Paths of Projectiles and Planets Under Gravity?
  • · Replies 13 ·
Replies
13
Views
2K
Doubt about solution -- Two masses connected by a rod moving on a surface
  • · Replies 7 ·
Replies
7
Views
2K
Newton's Third Law for book on a table
  • · Replies 8 ·
Replies
8
Views
3K
Question about the Microscopic Model of Current
  • · Replies 5 ·
Replies
5
Views
1K
Integrating Biot-Savart Law at a point
  • · Replies 18 ·
Replies
18
Views
2K
Electric Field of a Uniform Ring of Charge
  • · Replies 28 ·
Replies
28
Views
4K
Experiment - how temperature changes along a tube, using heaters
  • · Replies 14 ·
Replies
14
Views
2K
Speed of Current in a coaxial cable
  • · Replies 1 ·
Replies
1
Views
1K
How could the discrepancy be reduced between the two readings?
  • · Replies 10 ·
Replies
10
Views
2K
Current on Infinite Periodic LC Circuit
  • · Replies 2 ·
Replies
2
Views
1K
Buoyant force acting on an inverted glass in water
  • · Replies 79 ·
3
Replies
79
Views
6K
Kinematics in Two Dimensions (Monkey and Hunter Thought Experiment)
  • · Replies 3 ·
Replies
3
Views
2K
Why does less dense air rise and more dense air come down?
  • · Replies 18 ·
Replies
18
Views
2K
Falling stick problem (no friction): What is the kinetic energy?
  • · Replies 3 ·
Replies
3
Views
1K
Angle between proton velocity and B-field
  • · Replies 2 ·
Replies
2
Views
1K
Impact force of model rocket with parachute
  • · Replies 17 ·
Replies
17
Views
2K
How do I find the normal force?
  • · Replies 16 ·
Replies
16
Views
7K
Weird Thing About Coriolis Acceleration and Coriolis Force?
  • · Replies 29 ·
Replies
29
Views
2K
Dimensional Analysis: Forster Energy Transfer equation
  • · Replies 2 ·
Replies
2
Views
1K
Magnitude of external electric force on electric dipole
  • · Replies 13 ·
Replies
13
Views
2K
Oscillation of bead with gravitating masses
  • · Replies 5 ·
Replies
5
Views
2K
A ball is dropped from the top of a 55.0 m high cliff
  • · Replies 8 ·
Replies
8
Views
6K
Krotov problem: how to write Energy conservation for this fluid?
  • · Replies 4 ·
Replies
4
Views
1K
Question about source flow rate across line AB.
  • · Replies 4 ·
Replies
4
Views
1K
Question about flow rate in the source flow
  • · Replies 10 ·
Replies
10
Views
2K
Angular deceleration of the Earth
  • · Replies 52 ·
2
Replies
52
Views
4K
Motion with Time-Dependent Angular Acceleration
  • · Replies 4 ·
Replies
4
Views
1K
Why Wasn't (0,-3) Included in the Initial Graph of a Traveling Sinusoidal Wave?
  • · Replies 3 ·
Replies
3
Views
1K
The percentage error in the Radioactive substance Population
  • · Replies 5 ·
Replies
5
Views
1K
Calculating Chemical Potential from Energy Derivatives
  • · Replies 4 ·
Replies
4
Views
1K
Is a point of inflection concave or convex? - Which answer is correct?
  • · Replies 2 ·
Replies
2
Views
1K
Solving the SHM differential equation
  • · Replies 4 ·
Replies
4
Views
1K
Why is it important to classify circuits as series or parallel?
  • · Replies 5 ·
Replies
5
Views
2K
How Does a Moving Support Affect Pendulum Motion?
  • · Replies 23 ·
Replies
23
Views
2K
What is the least time to get from point ##A## to point ##B##
  • · Replies 2 ·
Replies
2
Views
1K
Morin classical mechanics differential equation problem
  • · Replies 8 ·
Replies
8
Views
2K
Deriving position function for object in SHM
  • · Replies 5 ·
Replies
5
Views
2K
Finding time difference between two arriving wave fronts
  • · Replies 6 ·
Replies
6
Views
1K
What Is The Maximum Force The Locust Exerted on The Plate?
  • · Replies 24 ·
Replies
24
Views
2K
Need Help to Understand an Equation for Air Resistance
  • · Replies 29 ·
Replies
29
Views
2K
Describing Rolling Constraint for Rolling Disk With No Slipping
  • · Replies 6 ·
Replies
6
Views
3K
Calculate orbital angular momentum
  • · Replies 2 ·
Replies
2
Views
1K
Density of cylinder that undergoes vertical oscillation
  • · Replies 1 ·
Replies
1
Views
1K
How Does an Asteroid's Speed Change Upon Impact with Mars?
  • · Replies 7 ·
Replies
7
Views
3K
Understanding Periodic Motion: Proving and Explaining its Repeating Nature
  • · Replies 25 ·
Replies
25
Views
2K
Angular deceleration of a washing machine spin cycle
  • · Replies 9 ·
Replies
9
Views
2K
Help Me Tackle This Question: How Do I Start?
  • · Replies 8 ·
Replies
8
Views
1K
Phase Transitions in the Van Der Waals Gas
  • · Replies 2 ·
Replies
2
Views
2K
How Does Pressure Change Affect Internal Energy in an Ideal Gas?
  • · Replies 4 ·
Replies
4
Views
1K
What's wrong? Electric potential of a point on a ring
  • · Replies 10 ·
Replies
10
Views
2K
Describing motion of a particle qualitatively
  • · Replies 28 ·
Replies
28
Views
2K
PV diagram, ranking heat transfer between 4 processes
  • · Replies 5 ·
Replies
5
Views
1K
Understanding equations and their relationships (multiple equal signs)
  • · Replies 7 ·
Replies
7
Views
1K
Angular velocity of an airplane
  • · Replies 18 ·
Replies
18
Views
3K
Motion with constant angular acceleration
  • · Replies 3 ·
Replies
3
Views
2K
Finding Constants: Potential and Field Analysis
  • · Replies 5 ·
Replies
5
Views
2K
Why is the Kinetic Energy of a Spring (1/6)mv²?
  • · Replies 13 ·
Replies
13
Views
2K
Why do some physics textbooks say P = dK/dt and others say P = dE/dt?
  • · Replies 5 ·
Replies
5
Views
2K
Bernoulli’s Equation for plugging finger into dike under water
  • · Replies 4 ·
Replies
4
Views
2K
Pendulum Question (Matlab Coursework)
  • · Replies 4 ·
Replies
4
Views
2K
Friction and an object stopping
  • · Replies 12 ·
Replies
12
Views
3K
Why Measure the Center of Mass from the Same Position After a Collision?
  • · Replies 2 ·
Replies
2
Views
1K
Proving COM Moves 0.5(x_1 + x_2) in Δt
  • · Replies 5 ·
Replies
5
Views
1K
Displacement and distance when particle is moving in curved trajectory
  • · Replies 66 ·
3
Replies
66
Views
6K
Did I Miscalculate the Speed for a Leaking Cart Under Acceleration?
  • · Replies 21 ·
Replies
21
Views
2K
Finding Area of Ring Segment to Find Electric Field of Disk
  • · Replies 10 ·
Replies
10
Views
2K
Calculate the Speed of a Satellite Moving in a Stable Circular Orbit
  • · Replies 1 ·
Replies
1
Views
2K
No Limits of Integration for Electric Field Integral?
  • · Replies 5 ·
Replies
5
Views
2K
Elastic Collision Between Two Balls
  • · Replies 9 ·
Replies
9
Views
2K
How to Calculate the Bounces of a Bouncy Ball
  • · Replies 5 ·
Replies
5
Views
3K
Variable mass, uniform body, force -- pulling a massive rope
  • · Replies 31 ·
2
Replies
31
Views
3K
Work, Power and Energy — Lifting a coiled rope up off a surface
  • · Replies 52 ·
2
Replies
52
Views
4K
Why Use Right-Handed Coordinates for Problem Solving?
  • · Replies 8 ·
Replies
8
Views
1K
Does distance affect torque in hanging sign problem?
  • · Replies 42 ·
2
Replies
42
Views
4K
Difference between scalar and cross product
  • · Replies 5 ·
Replies
5
Views
1K
Why do we have a charge in the denominator of equation for voltage?
  • · Replies 2 ·
Replies
2
Views
1K
Explaining the Cross Product for Two Vectors
  • · Replies 11 ·
Replies
11
Views
2K