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.
The speed of the point of intersection of two uniformly moving lines
  • · Replies 24 ·
Replies
24
Views
2K
Theoretical velocities at different heights sliding down an inclined plane
  • · Replies 4 ·
Replies
4
Views
1K
How to determine if electrical components are connected in parallel or in series?
  • · Replies 10 ·
Replies
10
Views
2K
Electric flux through an inclined cylinder
  • · Replies 16 ·
Replies
16
Views
1K
A charge q approaching two stationary charges q1 and q2
  • · Replies 7 ·
Replies
7
Views
1K
Analyzing this 2-lens optical system
  • · Replies 5 ·
Replies
5
Views
2K
Charge conservation for 3 parallel charged plates
  • · Replies 19 ·
Replies
19
Views
2K
Force transmitted to a block in viscous fluid through a spring, cord, and pulley
  • · Replies 6 ·
Replies
6
Views
1K
Two Inverted Pendulums connected by a rope
  • · Replies 10 ·
Replies
10
Views
694
Gauss' law problem -- Should the field due to both the inside and outside charges be taken into account?
  • · Replies 28 ·
Replies
28
Views
2K
Help finding the change in potential energy in this problem
  • · Replies 9 ·
Replies
9
Views
1K
Textbook 'The Physics of Waves': Linearity of Forced Oscillator
  • · Replies 6 ·
Replies
6
Views
1K
Induced currents on a pair of separated dipole antennas
  • · Replies 2 ·
Replies
2
Views
860
Thermodynamic cyclic process - 2 isobaric and 2 adiabatic
  • · Replies 5 ·
Replies
5
Views
1K
Ball launched from a height of 5 meters --- Projectile motion
  • · Replies 12 ·
Replies
12
Views
1K
Block on top of an inclined plane, with a rough surface, that moves with constant acceleration
  • · Replies 41 ·
2
Replies
41
Views
4K
Energy analysis of the system (leaking bucket from Morin's "Mechanics"
  • · Replies 5 ·
Replies
5
Views
1K
Textbook 'The Physics of Waves': Lifetime of SHM Oscillators
  • · Replies 5 ·
Replies
5
Views
1K
Textbook 'The Physics of Waves': Calculating Work Done by Force
  • · Replies 2 ·
Replies
2
Views
1K
Textbook 'The Physics of Waves': Reason to force us to consider complex solution for harmonic motion?
  • · Replies 3 ·
Replies
3
Views
1K
Is there a limit on how much energy a photon might have in a FOR?
  • · Replies 10 ·
Replies
10
Views
1K
How to parametrize motion of a pendulum in terms of Cartesian coordinates?
  • · Replies 1 ·
Replies
1
Views
1K
Is the line integral of tangential force in pendulum equal to the negative of change in potential energy?
  • · Replies 3 ·
Replies
3
Views
1K
What is meant by small oscillations for this potential energy function?
  • · Replies 2 ·
Replies
2
Views
1K
Initial velocity of bird landing on horizontal wire modeled as spring
  • · Replies 7 ·
Replies
7
Views
1K
Circular motion of a Weightless rod
  • · Replies 18 ·
Replies
18
Views
1K
Electric field of point along the central vertical axis of a triangle
  • · Replies 3 ·
Replies
3
Views
1K
Proving Newton's 3rd law from conservation of momentum
  • · Replies 2 ·
Replies
2
Views
1K
Finding speed of two billiard balls in elastic collision
  • · Replies 9 ·
Replies
9
Views
1K
Electromagnetism - Infinite plane of charge & Tension
  • · Replies 9 ·
Replies
9
Views
1K
Measurement of the Stefan-Boltzmann constant
  • · Replies 6 ·
Replies
6
Views
871
Why is the superposition principle valid here?
  • · Replies 5 ·
Replies
5
Views
1K
Morin 3.7 -- Block sliding sideways on an inclined plane
  • · Replies 11 ·
Replies
11
Views
2K
How Do Mass and Weight Differ?
  • · Replies 29 ·
Replies
29
Views
2K
Equivalence of Euler-Lagrange equations and Cardinal Equations for a rigid planar system
  • · Replies 4 ·
Replies
4
Views
2K
Rotating simple harmonic oscillator
  • · Replies 11 ·
Replies
11
Views
2K
Deriving speed equations | Elastic collision
  • · Replies 1 ·
Replies
1
Views
969
Force analysis of a spring-bob system
  • · Replies 2 ·
Replies
2
Views
855
Block on top of moving slab, with a rough surface - When does v_b=v_s?
  • · Replies 27 ·
Replies
27
Views
2K
Impulse and perfectly inelastic collision between 2 points
  • · Replies 4 ·
Replies
4
Views
1K
Conservation of energy of a bow and arrow
  • · Replies 3 ·
Replies
3
Views
1K
Stretched spring attached to the center of a pure rolling disk
  • · Replies 11 ·
Replies
11
Views
1K
What is taken as datum level for the following absolute potentials?
  • · Replies 2 ·
Replies
2
Views
774
Applying Force on a Cylinder at an Angle
  • · Replies 8 ·
Replies
8
Views
1K
Free Body Diagram of Mass-Spring System
  • · Replies 5 ·
Replies
5
Views
2K
Conservation of Mechanical Energy - Which Equation To Use?
  • · Replies 9 ·
Replies
9
Views
2K
Closest distance of approach between 2 charged particles
  • · Replies 5 ·
Replies
5
Views
2K
System of two wheels of different sizes with an axle through their centers
  • · Replies 67 ·
3
Replies
67
Views
5K
Change in Entropy When Mixing Water at Different Temperatures
  • · Replies 5 ·
Replies
5
Views
2K
Question About Momentum: Ball Rolling up a Curved Ramp
  • · Replies 12 ·
Replies
12
Views
2K
Homer Simpson spinning inside an hourglass
  • · Replies 4 ·
Replies
4
Views
762
Resultant force on a parachutist
  • · Replies 11 ·
Replies
11
Views
1K
A moving boat with a flag on its mast
  • · Replies 15 ·
Replies
15
Views
1K
Calculating work done by a gas
  • · Replies 2 ·
Replies
2
Views
1K
Length Contraction Problem for a Rod in a Spaceship
  • · Replies 4 ·
Replies
4
Views
762
Perfectly inelastic collision between Projectile and a hinged disk
  • · Replies 26 ·
Replies
26
Views
2K
Moving charge deflected by a loop of wire
  • · Replies 1 ·
Replies
1
Views
969
Theory of relativity -- Car and Garage Paradox
  • · Replies 13 ·
Replies
13
Views
1K
Maximum allowable value of a force
  • · Replies 5 ·
Replies
5
Views
1K
Conservation of Momentum Problem - Mechanical and Kinetic Energies
  • · Replies 2 ·
Replies
2
Views
1K
Dynamics of a Block on top of a slab with friction between them
  • · Replies 33 ·
2
Replies
33
Views
2K
Find the Period of Oscillation for a Mass Falling Through a Tunnel Through the Earth
  • · Replies 7 ·
Replies
7
Views
2K
Textbook 'The Physics of Waves': Derive Complex Solution Form for SHM
  • · Replies 6 ·
Replies
6
Views
1K
Is it friction or tension acting on the person hanging on a rope?
  • · Replies 4 ·
Replies
4
Views
1K
Could someone help me study this cyclic process of an ideal gas?
  • · Replies 35 ·
2
Replies
35
Views
2K
Spherical ball rolling back and forth in a bowl
  • · Replies 24 ·
Replies
24
Views
2K
Determine the force with which the magnetic field of a coil acts on an infinitesimal cube of iron
  • · Replies 6 ·
Replies
6
Views
1K
Speed of charged balls after collision
  • · Replies 13 ·
Replies
13
Views
1K
Electric Field of a quarter ring
  • · Replies 3 ·
Replies
3
Views
826
Maxwell disc linked to bar unwinds but stays at same height by raising bar
  • · Replies 2 ·
Replies
2
Views
926
Gauss' Law with a Insulating Shell
  • · Replies 4 ·
Replies
4
Views
21K
Induced EMF in a rotating ring
  • · Replies 14 ·
Replies
14
Views
1K
For what values of total energy is the resulting motion periodic?
  • · Replies 25 ·
Replies
25
Views
1K
Why are moments not included in free body diagrams?
  • · Replies 31 ·
2
Replies
31
Views
2K
Ruler measurements and knowing how many decimal places to include
  • · Replies 9 ·
Replies
9
Views
4K
Energy analysis of this system (curved ramp up and a spring)
  • · Replies 29 ·
Replies
29
Views
1K
Dispersion of rightward steps in 1-D random walks
  • · Replies 3 ·
Replies
3
Views
809
B-field from a current in a wire above a conducting surface
  • · Replies 1 ·
Replies
1
Views
731
Determining impulse given stopping distance and change in velocity
  • · Replies 6 ·
Replies
6
Views
877
Special Relativity: spaceships heading toward each other
  • · Replies 7 ·
Replies
7
Views
1K
Quantum Mechanics - Time dependent solution - x's and t's not mixed up
  • · Replies 2 ·
Replies
2
Views
872
Torques acting on a cylinder, with friction
  • · Replies 1 ·
Replies
1
Views
669
Block connected to 2 real pulleys
  • · Replies 18 ·
Replies
18
Views
1K
Manned spacecraft to Tau problem
  • · Replies 5 ·
Replies
5
Views
737
Events occuring in 4D spacetime
  • · Replies 1 ·
Replies
1
Views
701
A rod sliding/falling down on a frictionless horizontal plane
  • · Replies 8 ·
Replies
8
Views
1K
Why is a 1d conservative force approximately linearly related to position?
  • · Replies 3 ·
Replies
3
Views
889
Finding magnetic field using Ampere's Circuital Law
  • · Replies 5 ·
Replies
5
Views
1K
Is My Understanding of Accelerations in Irodov 1.258 Correct?
  • · Replies 14 ·
Replies
14
Views
2K
Two masses connected by Pulley - Lagrangian problem
  • · Replies 6 ·
Replies
6
Views
1K
Trying to Calculate Initial Velocity and Final Velocity
  • · Replies 2 ·
Replies
2
Views
950
Colour depends on wavelength or frequency?
  • · Replies 22 ·
Replies
22
Views
1K
Magnetic field outside a semi-infinite solenoid
  • · Replies 12 ·
Replies
12
Views
2K
An ambigious optical system with ambigious solutions [JEE Adv - 20`16]
  • · Replies 19 ·
Replies
19
Views
2K
Lagrangian of a block on an inclined plane
  • · Replies 16 ·
Replies
16
Views
1K
Failed rocket problem (momentum conservation, Kleppner 4-4)
  • · Replies 3 ·
Replies
3
Views
941
Can a Falling Mass Generate 12V Using an Optimal Magnet and Coil?
  • · Replies 9 ·
Replies
9
Views
982
Double pendulum Lagrangian using small angle approximation formula
  • · Replies 5 ·
Replies
5
Views
1K
Euler- Lagrange equation proof
  • · Replies 2 ·
Replies
2
Views
961
Find temperature of a U-shaped Tube
  • · Replies 9 ·
Replies
9
Views
1K