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.
Rope tension problem: Mass hanging from a rope tied at an angle
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21
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965
Potential in spherical shells
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2
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718
Internal Resistance Affect the Balancing Length in a Potentiometer?
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12
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963
Robot starts to overturn when reaching to pick up a load
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2
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565
Distance rolled of sphere vs cylinder with same m, r, and v
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5
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749
Determine energy required to stop rolling mass
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10
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691
Required force for sphere start rolling
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2
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703
Conservation of String Exercise
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5
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702
Reflection and Transmission of String Waves
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8
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1K
Tension in a rope hanging between 2 trees
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24
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1K
How do I calculate the Tension in a rope going over a smooth pulley?
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19
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1K
Liquid rocket engine excercise
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1
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949
Connecting a number of EMF sources in a circle to form a circuit
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9
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1K
Friction force on a ball falling through a body of water
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9
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1K
Is the Trigonometric Analysis of Conveyor Belt Forces Correct?
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6
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642
Gradient and Divergence in spherical coordinates
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3
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1K
Making a vehicle go straight on carpet
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8
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676
A Braking System with Spikes for Cars
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4
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717
Torque on a Circular Current Loop under a Misaligned Magnetic Field
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1
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999
Rod with Current on Rails in Magnetic Field
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12
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2K
A problem in applying Kirchhoff's Voltage Law
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1
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796
Body attached to a block by a spring, shaped like an inclined plane
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1
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955
Ball revolving around a massive disc and a cube placed at centre
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1
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763
A cylinder rotating on a plane with friction and then moving across a frictionless plane to a collision
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1
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795
Finding the intermediate height of a ball in terms of its maximum height
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3
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817
Time taken for a planet to collide with the Sun
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10
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803
Why is there no current flow in the middle branch? (Circuits problem)
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8
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868
Temperature dependence of resistance
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6
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937
Find the density of surface charges at the boundary of two conductors with different resistivities
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6
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907
Trying to tie two runners of different speeds over a race
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30
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1K
Can Energy Conservation Solve the Angular Velocity Problem?
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6
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759
How do we represent a triangle wave for input voltage in this circuit?
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3
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745
Why is Radial Acceleration Ignored for a Rotating Board?
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9
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979
Concept of different accelerations on rotations of rigid bodies
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10
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876
Relativistic Decay and Separation Between Moving Nuclei A and B
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1
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592
Looking for observed rotation periods of various Foucault pendulums at different latitudes
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6
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851
Textbook 'The Physics of Waves': Varying Force Amplitude
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3
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957
Expression for magnitude of the constant friction force
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7
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1K
Energy conservation equation to find equation for final velocity
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4
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1K
How Many Eggs to Turn a 40lb Flywheel in a Vacuum?
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10
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831
Effect of rim width on a frisbee's stability and range
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8
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661
Rocket + Connected Body Dynamics problem
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47
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3K
Quantum Mechanics Boundary conditions
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3
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734
Uncertainty in particle position
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3
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574
Reflection probability in Quantum Mechanics
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2
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593
Why is the direction of kinetic/static friction up a ramp?
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7
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1K
Heated gas pushing a mercury column out of a cylinder
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10
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810
Temperature of two subsystems at equilibrium
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7
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942
Doppler Effect Question: Flying Bat Echolocating a Mosquito
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12
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1K
Final momentum of box with reflective interior hit by ideal laser
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4
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920
Explain why applying different forces to objects of different masses result in different accelerations
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9
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1K
Incandescent Bulb - suitable approximation for voltage-current curve
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2
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946
Diophantine equations and physics
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1
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784
Underground cables faulty point detected
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24
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1K
Motion of an electron inside the cavity of a charged sphere
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5
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892
How to solve this driven RLC circuit?
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13
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1K
Electrostatics and current problem with 3 metallic balls
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29
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1K
How to set up this problem with driven torsional oscillator?
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5
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901
Find the mass of odium for both solid and liquid state
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9
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865
Find the final temperature of the combined honorite and odium?
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5
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709
Difference between maximizing amplitude by choosing omega_0 given omega_d versus choosing omega_d given omega_0.
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4
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878
Mechanisms Involved When Charging a Battery
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10
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1K
Find final temp of 2 substances once they have reached equilibrium
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6
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893
What is the meaning of the intercept of a particular solution to damped oscillator?
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7
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916
Magnetic Field of an infinite current-carrying wire at a point
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5
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1K
To what extent does this system behave as a pendulum?
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1
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898
Force on a block placed on a rotating disc, calculated in different reference frames
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25
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2K
How does a simple circuit work?
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12
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1K
Why is current constant through a resistor?
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11
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1K
Did I Misuse the Parallel Axis Theorem for Polar Moment of Inertia?
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2
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881
Why is the current in a conductor equal to zero when not connected to a circuit?
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13
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913
Why does electric potential energy increase if you move against the field?
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6
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1K
Determining angular velocity of weight attached to a cord and cylinder
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23
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1K
Electromagnetic force on a positively charged particle
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3
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647
Why would this be accelerating positively?
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6
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966
Calculating the Relative COG of Two Masses
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20
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2K
Pistons placed on top of communicating vessels
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20
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986
Is Linear Momentum Conserved in This Case? (sliding box hits a floor tile)
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2
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906
Ray optics: velocity of image reflected off a moving mirror
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5
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1K
Analyzing torque of an automobile engine
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6
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926
Confusion over acceleration of gravity as positive/negative
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10
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1K
A cylinder has two sides containing gas and water separately
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4
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623
Finding the angular velocity of a pendulum
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3
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950
Number of bright fringes given by diffraction grating on a screen
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6
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3K
How Many Lines Per Millimeter Does the Diffraction Grating Have?
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5
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15K
What’s gone wrong with my derivation of the Lorentz Factor?
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7
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818
Find ratio of brightness & the distance the 6th dark fringe is from central fringe
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5
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679
Coulomb's law to find electric field for charge density function
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11
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1K
Find smallest distance x from y-axis for both constructive & destructive interference to occur
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5
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754
Find smallest value of y for constructive interference
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3
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619
EMF induced in moving rod in B-field, why is "L" length of wire frame?
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4
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772
Why is vertical displacement second order in horizontal displacement for coupled oscillator?
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8
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762
Induced EMF due to a moving magnet
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7
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845
How to Apply Derivatives in Physics Problems?
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9
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1K
How to calculate pressure when two forces are exerted
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23
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1K
Equivalent resistance of this 6-sided circuit
2
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59
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2K
Please help with this suggested solution involving electrostatic press
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14
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1K
Find the change in the time required, if acceleration increases by the differential amount 'da'
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7
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1K
Solving for potential using surface charge density of a sphere
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3
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1K
Tension in a string which connects 3 pulleys
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12
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1K

Intro Physics Homework Help

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