Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
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Mechanics - Cylinders, springs and rough inclined plane
- cupid.callin
- · Replies 5 ·
Mutual Inductance for a Pair of Coils
- mjk71
- · Replies 4 ·
Why Does the Pendulum Angle Calculation Show 60° Instead of 30°?
- cupid.callin
- · Replies 3 ·
Rotation - Moment of Inertia of semicircular disc
- cupid.callin
- · Replies 1 ·
Velocity as a function of length
- Tombo254
- · Replies 2 ·
How Does Friction Affect a Rotating Disk on an Inclined Plane?
- mmainak
- · Replies 3 ·
Average power needed to lift an object
- IAmPat
- · Replies 1 ·
Two particles heading toward each other
- chawki
- · Replies 1 ·
Tangential speed problem with a hard drive disk
- Spartan301
- · Replies 2 ·
Finding the minimum angle of deviation for an equilateral prism
- thezac11
- · Replies 3 ·
Pulley Cable System (Conceptual)
- jzwiep
- · Replies 4 ·
Power needed to push an object vertical at constant velocity
- IAmPat
- · Replies 6 ·
Electric potential of hydrogen molecular ion
- smoics
- · Replies 11 ·
Newtonian Gravity- Body 'falling' into the sun integration problems
- Romeo
- · Replies 10 ·
Fringe spacing for a diffraction grading (wave optics)
- spaghed87
- · Replies 6 ·
Kinetic Energy Ratio and Momentum Ratio in Two Substances
- vipulgoyal
- · Replies 2 ·
Finding the angle that maximizes height plus distance for a projectile
- rizzi143
- · Replies 1 ·
Why isn't radius of curvature at max height just the maximum height?
- vipulgoyal
- · Replies 7 ·
Determining friction in tug of war
- Ph_Student001
- · Replies 1 ·
Solving LCR Circuit: Find C, I_rms, I_rms at Resonance
- tomrja
- · Replies 3 ·
Equation of continuity of water depth
- etothey
- · Replies 4 ·
Center of Gravity questions - Center of Area
- physicx_1
- · Replies 3 ·
Magnesium ion entering a mass spectrometer. find r
- XxphysicsxX
- · Replies 1 ·
Is EMF Induced in a Square Loop Moving Through a Magnetic Field?
- clementc
- · Replies 1 ·
Changing Magnetic Field Causes Induced Electric Field
- futurepocket
- · Replies 1 ·
What is the constant density of a solid sphere given its radius and mass?
- etothey
- · Replies 1 ·
Using Kirchoff rule to find Voltage drop and current, in a complex circuit
- immyrichie
- · Replies 7 ·
Using Fermat's principle to prove the law of reflection
- etothey
- · Replies 1 ·
2D Momentum Problem with little info for Object
- aeromat
- · Replies 4 ·
What is the force required to release the lock on the water storage window?
- Smartornot
- · Replies 7 ·
Why Do Terms in the Energy Equation Not Cancel as Expected?
- 2much
- · Replies 1 ·
How to Find the Maximum Range of a Ball Shot from a Spring Gun?
- vipulgoyal
- · Replies 2 ·
Initial acceleration of a projectile incl air resistance
- mitch_1211
- · Replies 1 ·
Circuits: What is wrong with my polarities?
- Saladsamurai
- · Replies 1 ·
What is the energy of a 500 nm photon and electron in quantum physics?
- musicmar
- · Replies 2 ·
Maximum potential (coaxial cable)
- weesiang_loke
- · Replies 1 ·
Distance traveled during speeding-up phase of a propelled sled
- IAmPat
- · Replies 9 ·
The maximum and minimum transverse speeds of a point at an antinode
- TFM
- · Replies 22 ·
Why weight and normal force aren't a Newton's third law pair
- ProPM
- · Replies 3 ·
Magnetic Field Question. Grade 12 Physics.
- ampa23
- · Replies 5 ·
Find Maximum Velocity Range in Velocity Selector using Vmax and B values
- michael650
- · Replies 1 ·
At what point or points on the x-axis is the electric potential zero?
- smoics
- · Replies 4 ·
At which points on the x-axis (not at infinity) is the electric potential zero?
- dmitriylm
- · Replies 8 ·
Finding force from potential energy U(x) = αx⁴ at x = -0.660 m
- javacola
- · Replies 1 ·
Effect of collision time on momentum change
- ProPM
- · Replies 4 ·
How Do You Calculate the Magnetic Field at a Point Near a Current-Carrying Wire?
- cmcrus02
- · Replies 3 ·
Finding input impedance in parallel RC circuit with complex values
- Cursed
- · Replies 6 ·
What is the Coefficient of Kinetic Friction on a Horizontal Surface?
- javacola
- · Replies 1 ·
Projectile Motion Time Question
- Nerdyboy
- · Replies 4 ·
Solving a Lengthy Spring Problem: My Attempts
- Jolsa
- · Replies 10 ·
Conceptual/mathematical center of mass question
- quincyboy7
- · Replies 1 ·
Putty dropped on a frame suspended from a spring.
- jax988
- · Replies 3 ·
Types and structures of capacitors
- Googl
- · Replies 1 ·
** Question related to Orbital speed of star, Keep getting *10^4 to high?
- pargeterw
- · Replies 9 ·
What are the normal forces at points A and B in a moment and couple problem?
- yoda2026
- · Replies 8 ·
How Do You Calculate the Angle to Reach a Moving Target in a River?
- st0nersteve
- · Replies 4 ·
What is Continuity of Function and How Does it Lead to A+B=C?
- nathangrand
- · Replies 2 ·
Mars balloon , forces, pressure
- Bassalisk
- · Replies 7 ·
Ball thrown upward from bridge: position, time to water, final velocity
- cassiek
- · Replies 3 ·
Speed of a truck wthout brakes down a hill
- jamilm9
- · Replies 1 ·
Forces on a box standing on a table
- Peter G.
- · Replies 8 ·
How Do You Calculate Angular Momentum for a Rotating Rigid Body?
- math_head7
- · Replies 3 ·
Magnetic forces (no calculations)
- XxphysicsxX
- · Replies 2 ·
Finding metal density from thread tension before and after immersion
- Student_93
- · Replies 10 ·
Magnitude of induced voltage in conductor within AC solenoid
- uby
- · Replies 1 ·
The box weighs 400lb and the person can pull with 200 lb of force.
- smallittle
- · Replies 1 ·
Average Current in Coil Rotated in Magnetic Field
- dvolpe
- · Replies 1 ·
Forces in the triangle and pulley system
- godkills
- · Replies 5 ·
Calculating Angle of Incidence for Blue Light Using Refractive Index Data
- name_ask17
- · Replies 10 ·
Calculating the Spring Constant k of a Spring
- jimithing71
- · Replies 19 ·
Why doesn't a spinning top fall over instantly?
- ashishsinghal
- · Replies 24 ·
Finding linear density of right string with equal tension and frequency
- jcfor3ver
- · Replies 1 ·
Formula for the magnetic field inside a solenoid
- ashleyd
- · Replies 2 ·
Calculating Energy and Power in an Inductive Circuit
- lcam2
- · Replies 2 ·
Converting kinetic energy units from ft²/s² to Btu/lbm
- Xyius
- · Replies 1 ·
Properties of an ideal bungee rope and elastic limit
- someone1235
- · Replies 3 ·
Periodicity properties of complex exponentials in discrete/continuous time
- Jncik
- · Replies 4 ·
Thermodynamics - partial differential
- Beer-monster
- · Replies 6 ·
Why Is the Minimum Speed Where the Seat Exerts No Force?
- ThomasMagnus
- · Replies 7 ·
Calculating the monochromatic flux of a star
- Chowie
- · Replies 1 ·
Entropy Change in Blackbody Radiation System in Thermal Equilibrium
- blueyellow
- · Replies 1 ·
Actual Scenario Qualitative Wiring Problem
- michael650
- · Replies 1 ·
How Does Mass Affect Spring Stretch in Hooke's Law?
- mateomy
- · Replies 1 ·
Voltages across circuit elements
- tomrja
- · Replies 5 ·
Amplitude of a wave when changing depth
- nilic1
- · Replies 3 ·
Do ΔU = Cv(T2 - T1) and ΔH = Cp(T2 - T1) apply to all processes?
- mune
- · Replies 12 ·
Question on directions of currents and magnetic fields
- 123yt
- · Replies 5 ·
Finding m2 in a collision between two spheres
- rayven18
- · Replies 2 ·
Forces on a rotating rod: why is my force balance wrong?
- cupid.callin
- · Replies 9 ·
Derivatives of Exponential Cosine Function
- mitch_1211
- · Replies 4 ·
Calculating the Number of Collisions Required for Neutron Moderation
- clynne21
- · Replies 2 ·
Calculate the surface charge distribution on a metal disc
- Vipho
- · Replies 1 ·
Cofficient of static friction between table and rope
- Mitchlan
- · Replies 3 ·
How Does an Air Conditioner Affect Entropy and Heat Transfer?
- theown1
- · Replies 3 ·
Solving a Physics Problem: Car Drives Off a Cliff
- eliassiguenza
- · Replies 3 ·
Electrical oscillations of an RLC circuit
- JHans
- · Replies 6 ·
Inductor and Capacitor at different frequencies
- tomrja
- · Replies 1 ·
Calculating Phase Transitions in a Water-Ice Mixture
- liz_p88
- · Replies 5 ·
How Do We Measure the Size of the Galaxy with Limited Telescope Scans?
- flyingpig
- · Replies 1 ·