Introductory Physics Homework Help Forum

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Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Terminal velocity and acceleration
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Clarifying the Definition Total/Stagnation Pressure (p₀) in Bernoulli'
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2
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A particle's momentum in a magnetic field
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3
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1K
The energy needed to construct a charged hollow spherical shell with finite thickness
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1
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890
Calculation of charge flowing through a loop
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7
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1K
Height of the image of my friend on the film
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2
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781
Why Was My Answer of 63 cm for the Focal Length of a Converging Lens Incorrect?
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1
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727
Drone dragging a hose behind it
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24
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2K
Torque biomechanics
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6
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2K
(Answer check) for a work problem
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3
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787
Question related two different ways to do solution
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1
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721
CO2-powered metric racer car competition | help please?
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14
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1K
Force acting on one side of a fluid
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22
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1K
Coefficient of Restitution for a Hypothetical Collision where masses are not equal after the collision compared to before the collision
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6
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1K
Confusion regarding surface tension direction and force balance
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2
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39
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2K
Convert to Center of Mass Reference Frame
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9
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1K
How far from the point of release will the ball hit the ground?
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16
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1K
Irodov 1.23 confusion: Calculate distance traveled and time elapsed for this decelerating particle
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2
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1K
What is force? How can we interpret the full definition of force?
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6
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899
Calculate velocities in COM reference frame for 2D collision
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27
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1K
Inclined plane problem
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13
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1K
AP physics 2: Phase change in thin film interference
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1
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909
Calculate the speed and angle of the center of mass before a collision
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3
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1K
Mastering physics homework: Mass oscillating on a vertical spring
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2
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783
Friction direction change in a inclined circular bend (car on a road)
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11
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1K
Induced current and force on circular loop in varying magnetic field
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4
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1K
Problem on Radiation Pressure
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2
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33
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1K
Quick Physics Questions I found online and need explanations solving
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10
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883
Calculate the energy transferred given the voltage, current and time
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5
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826
This 3 mass atwood problem is confusing me
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4
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1K
Left-to-Right Wave — How Does Particle X Move?
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23
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1K
Computing the moment of inertia for a rotary inverted pendulum
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5
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951
Ball on a string thrown around a spool
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3
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1K
Network Analysis, Kirchhoff's Laws, changing current source to voltage
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4
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1K
Graphs of RC Circuit Responses
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3
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1K
The problem of one tube and two balls on a plane
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3
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60
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3K
Calculating the Forces on a Charge
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7
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908
Ambiguous Problem Statement on Determining Speed of Aircraft
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13
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2K
How does a transistor act as an amplifier?
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6
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985
How do I find the intersection of the wrench's LOA?
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4
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1K
Momentum: why don't the two carts become one?
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2
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32
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How to calculate the errors in the measured period of a pendulum?
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6
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846
Series and Parallel Circuits using symmetry
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10
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988
How is the slider connected to the switch?
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6
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923
Thermal expansion of a glass rod and a metal ruler
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8
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948
A problem from a physics national competition
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13
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1K
Change in entropy of the surroundings in an irreversible process
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14
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1K
Surface current of superconducting sphere in magnetic field
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1
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984
Force of car pushing on a truck
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25
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1K
Force needed to raise a backpack
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1
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846
Uniform circular motion angle relationship
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6
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731
Simulating a Rotary Inverted Pendulum in Python
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15
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2K
Pressure of water coming out of a hose nozzle
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7
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Focal length of the eyepiece lens in a compound microscope
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7
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Find the magnitude of the child's acceleration
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7
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Why are these forces not included in the solution? (Torque Problem)
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12
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Why do compasses always point in the wrong direction?
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6
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Charge on disk with non uniform surface charge density
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12
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Optics problem with a glass lens immersed in water
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3
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950
Homework: Can a rest frame be chosen for the center of momentum for a system of two photons?
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7
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888
1-dimensional kinematics - final velocity of 2 trains in opposing direction
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3
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975
Total energy of a wave on a string
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2
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1K
What happens to the position of two attracting charges when a conductor is inserted between them?
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4
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836
Spring force required to overcome friction between two blocks
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10
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Rolling without slipping problem
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Stopping a rod moving with constant omega
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13
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Handling two SHMs in different directions
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18
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Sound in an Open Vertical Tube partially filled with Water
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4
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Best Egg Drop Contest Shock Absorber?
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1
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858
Problem involving SHM and a collision
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27
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Calculate the velocity of the canoe relative to the water
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8
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Amplitude of a stretched spring that is stretched further
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6
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942
Waves on a String Fixed at the Ends
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7
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Electric Potential Energy of Point Charge Systems
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2
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Landing reusable booster rockets
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Problem with the power of car
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3
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Tangential velocity of external satellite
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7
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839
Will my weather balloon work in the Stratosphere?
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7
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Angular momentum- rotating rod
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17
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Transverse mechanical waves in a steel wire
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10
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Thermodynamics - Dryness fraction Equations
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1
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802
Dryness fraction of saturated steam
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help whit problem of college admission exam
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5
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Loop equations for this battery-resistor circuit
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48
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Work done to insert a point charge 𝑞 at the center of a conducting sphere
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12
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Understanding a math step in solving Schrödinger's equation for single particle in a box
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8
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Center of mass and momentum- A question about systems
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25
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Circle approximation of a wave pulse on a string or spring
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29
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Calculating magnetic field outside a solenoid
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15
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Aerodynamics: Optimization of an aircraft engine
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2
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645
I do not understand why the extra 2 factor is there (energy of 1D electron gas at zero temperature)
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Rotating ring on a rough surface- but with a twist
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6
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151
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Electric potential of nested spherical shells
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4
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Another rotation problem -- Acceleration of a ring rolling on a surface
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1
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Why is it necessary to start this experiment with the water level at 400mL?
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Correct statement about light transmitted and reflected by windscreen
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11
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Force pulling on a string at an angle with a block at the other end
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Confusion about friction in rotating ring
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12
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Problem n. 7 chapter 4 Eisberg Resnick "Quantum Physics"
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9
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869
A block dropping onto a spring system
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2
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