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.
Static and Kinetic Friction -- Tilting a ramp until a block starts sliding
  • · Replies 11 ·
Replies
11
Views
3K
Sinking a cylinder with varying hole sizes
  • · Replies 97 ·
4
Replies
97
Views
14K
Why does an electron have minimum kinetic energy when its momentum is 2h/λ?
  • · Replies 8 ·
Replies
8
Views
2K
Analysis of systems in equilibrium: articulated structures
  • · Replies 29 ·
Replies
29
Views
2K
Why Does the Electric Field Component Ex Require a Negative Sign?
  • · Replies 4 ·
Replies
4
Views
2K
Archived Magnetic Flux through a Cylinder
  • · Replies 3 ·
Replies
3
Views
19K
Calculation of Electrostatic Potential Given a Volume Charge Density
  • · Replies 6 ·
Replies
6
Views
3K
Calculating ##F_{DB}##: Equilibrium in a Machine
  • · Replies 13 ·
Replies
13
Views
2K
Torques exerted on a vertical disk by multiple forces
  • · Replies 5 ·
Replies
5
Views
2K
How can the force of a normal reaction be electromagnetic?
  • · Replies 7 ·
Replies
7
Views
3K
How Are Beam Support Reactions Calculated?
  • · Replies 3 ·
Replies
3
Views
2K
Kinematics of movement subject to a variable acceleration
  • · Replies 13 ·
Replies
13
Views
1K
How do I solve a tension and torque problem without prior knowledge?
  • · Replies 3 ·
Replies
3
Views
2K
Analysis of a Figure to Calculate Force and Moment
  • · Replies 4 ·
Replies
4
Views
1K
Pushing on a spring connected to a block
  • · Replies 8 ·
Replies
8
Views
2K
Solving an Inertial Mystery: Angular Acceleration and Mud
  • · Replies 7 ·
Replies
7
Views
2K
Equilibrium of a rigid solid on a rod
  • · Replies 9 ·
Replies
9
Views
2K
Determining Current and Voltage Drop in RLC Circuit
  • · Replies 7 ·
Replies
7
Views
6K
Question about the conservation of mechanical energy
  • · Replies 7 ·
Replies
7
Views
2K
Determine the net torque acting about the center of mass
  • · Replies 7 ·
Replies
7
Views
2K
Kinetic energy of the Monster Hunter cannon
  • · Replies 3 ·
Replies
3
Views
1K
Moment of inertia of T bar about 3 axes
  • · Replies 21 ·
Replies
21
Views
2K
Why does a diamagnetic rod align perpendicular to a magnetic field?
  • · Replies 8 ·
Replies
8
Views
2K
Coulomb's law — A negative charge balanced between 3 positive charges
  • · Replies 9 ·
Replies
9
Views
2K
Calculate 6-Spoke Wheel Torque: F1d1+F2d2=F3d3+F4d4
  • · Replies 11 ·
Replies
11
Views
2K
Study of harmonic motion of a liquid in a V shaped tube
  • · Replies 2 ·
Replies
2
Views
1K
X-ray production and ionization energy
  • · Replies 2 ·
Replies
2
Views
2K
Torques on a vertical wheel due to 3 masses spaced along the wheel rim
  • · Replies 13 ·
Replies
13
Views
3K
2 blocks and a spring, SUVAT and F=ma
  • · Replies 4 ·
Replies
4
Views
1K
Trouble with the concept of tension....
  • · Replies 91 ·
4
Replies
91
Views
9K
Relative velocity passing a ball between two soccer players
  • · Replies 5 ·
Replies
5
Views
3K
Relative Velocity and Angles of Movement (Sears & Zemansky's Exercise)
  • · Replies 11 ·
Replies
11
Views
2K
Tainter Damper Figure: Analyzing Forces
  • · Replies 10 ·
Replies
10
Views
2K
Find angles such that the motion travels a specific distance
  • · Replies 10 ·
Replies
10
Views
2K
Angular Velocity from KE, radius, and mass
  • · Replies 4 ·
Replies
4
Views
3K
Kleppner Kolenkow 2.34 (mass whirling around on a string)
  • · Replies 15 ·
Replies
15
Views
6K
Inertia from four masses connected by massless rigid rods
  • · Replies 7 ·
Replies
7
Views
4K
Reduce the pressure in an air reservoir
  • · Replies 17 ·
Replies
17
Views
2K
Two traveling waves g(x,t) = Asin(kx-wt) and h(x,t) = Asin(kx+wt+phi)
  • · Replies 5 ·
Replies
5
Views
1K
Projectile Motion on an Incline
  • · Replies 6 ·
Replies
6
Views
3K
Calculating Energy Dissipation for a Moving Object Using Integral Calculus
  • · Replies 14 ·
Replies
14
Views
3K
Evaluating minimum and maximum values with calculations
  • · Replies 5 ·
Replies
5
Views
1K
Total force that a fluid exerts on a cylinder
  • · Replies 2 ·
Replies
2
Views
2K
How do I incorporate electric fields into capacitors?
  • · Replies 19 ·
Replies
19
Views
2K
Hollowed out sphere exerting gravitational force
  • · Replies 4 ·
Replies
4
Views
2K
Air wedge - why is reflection from top of first slide ignored?
  • · Replies 1 ·
Replies
1
Views
1K
Why is the height of the table not necessary to solve this problem?
  • · Replies 6 ·
Replies
6
Views
2K
Elevator falling and bouncing back from a spring
  • · Replies 1 ·
Replies
1
Views
1K
Skater pulling another skater with a rope, F=ma
  • · Replies 12 ·
Replies
12
Views
12K
Resultant force and centre of pressure in a tank
  • · Replies 16 ·
Replies
16
Views
2K
Tetrahedron with 3 points fixed, and force applied to 4th
  • · Replies 11 ·
Replies
11
Views
2K
I'm getting two possible uncertainties for frequency
  • · Replies 8 ·
Replies
8
Views
2K
Compressor driven by an electromagnet
  • · Replies 6 ·
Replies
6
Views
1K
Can't remember equation for coefficient
  • · Replies 2 ·
Replies
2
Views
1K
Second bright fringe in Young's Experiment
  • · Replies 3 ·
Replies
3
Views
1K
Functional representation of the oscillating graph
  • · Replies 15 ·
Replies
15
Views
1K
Air wedge interference pattern after being filled with water
  • · Replies 5 ·
Replies
5
Views
2K
Viscosity in lubricating fluid in the bench-guide of a machine
  • · Replies 16 ·
Replies
16
Views
2K
Manometer containing two liquids
  • · Replies 1 ·
Replies
1
Views
2K
Spring and block on an inclined plane
  • · Replies 27 ·
Replies
27
Views
9K
Is it possible to solve this problem without using integrals or derivatives?
  • · Replies 4 ·
Replies
4
Views
1K
Is Mass Irrelevant in This Problem?
  • · Replies 5 ·
Replies
5
Views
1K
Find the electric field at a point away from two charged rods
  • · Replies 11 ·
Replies
11
Views
4K
Expectation value in momentum space
  • · Replies 3 ·
Replies
3
Views
2K
Ampere's Law for Cylindrical Conductor
  • · Replies 2 ·
Replies
2
Views
2K
Acceleration required for ship to avoid crashing into another ship
  • · Replies 15 ·
Replies
15
Views
2K
Surface density of stars in a Galaxy
  • · Replies 1 ·
Replies
1
Views
2K
Rotational dynamics: Resolving forces
  • · Replies 29 ·
Replies
29
Views
4K
The maximal normal force (Friction with slanted surface)
  • · Replies 18 ·
Replies
18
Views
2K
Hanging mass on a massless pulley
  • · Replies 2 ·
Replies
2
Views
2K
Derive angular frequency for mass spring system
  • · Replies 14 ·
Replies
14
Views
2K
Order of Magnitude Difference: Solving with Torricelli & Bernoulli
  • · Replies 6 ·
Replies
6
Views
1K
Velocity comparison -- Which thrown mass hits the ground first?
  • · Replies 5 ·
Replies
5
Views
1K
Normal force at the top of a vertical loop -- Circular Motion Dynamics
  • · Replies 8 ·
Replies
8
Views
6K
Mass on a Spring semi-submerged in a liquid
  • · Replies 1 ·
Replies
1
Views
1K
Finding a rocket's speed at height h
  • · Replies 3 ·
Replies
3
Views
3K
Air Resistance Question -- Dropping a tennis ball and a feather....
  • · Replies 22 ·
Replies
22
Views
3K
1D collision, varying masses but same initial velocity
  • · Replies 15 ·
Replies
15
Views
2K
Distance travelled by a car considering only air friction?
  • · Replies 4 ·
Replies
4
Views
2K
How to find minimum possible mass
  • · Replies 6 ·
Replies
6
Views
2K
Force of spring equation problems
  • · Replies 4 ·
Replies
4
Views
2K
Find the Height of a Building by dropping a ball from the top
  • · Replies 7 ·
Replies
7
Views
3K
Phase of a wave - My interpretation
  • · Replies 4 ·
Replies
4
Views
2K
How Do You Calculate the Spring Constant from Two Different Masses?
  • · Replies 14 ·
Replies
14
Views
6K
2 very difficult light ray diagram questions -- help please
  • · Replies 25 ·
Replies
25
Views
5K
Is the rocket equation correct using conservation of momentum?
  • · Replies 8 ·
Replies
8
Views
2K
Flux density help please (seawater flowing in a tube)
  • · Replies 2 ·
Replies
2
Views
1K
Force and Kinematics -- Accelerating a 10kg box vertically
  • · Replies 5 ·
Replies
5
Views
2K
Acceleration of a person jumping off of a bathroom scale
  • · Replies 9 ·
Replies
9
Views
3K
Solving LC circuit with energy conservation
  • · Replies 4 ·
Replies
4
Views
2K
Pulling a crate across the floor with a rope at an angle
  • · Replies 14 ·
Replies
14
Views
4K
A 4kg mass sits on a frictionless table....
  • · Replies 3 ·
Replies
3
Views
2K
Checking Graphs: Are the Results Accurate?
  • · Replies 11 ·
Replies
11
Views
1K
NLM Problem: More variables than equations
  • · Replies 8 ·
Replies
8
Views
1K
Wave Period Calculation: Is 0.1 the Correct Answer for Frequency of 1/10?
  • · Replies 4 ·
Replies
4
Views
2K
Calculating Speed of a Wave | Solving Problem with Period of 0.025s
  • · Replies 8 ·
Replies
8
Views
2K
Hall effect over a conducting ring
  • · Replies 4 ·
Replies
4
Views
2K
Kinematics chasing problem: Car vs. Motorcycle acceleration question
  • · Replies 5 ·
Replies
5
Views
2K
Solving Simple Oscillation Frequency: A Quick Guide
  • · Replies 11 ·
Replies
11
Views
1K
Simplify this expression for the period
  • · Replies 4 ·
Replies
4
Views
3K