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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Why is cosine alpha needed in electric field integral over a sphere?
- cwill53
- · Replies 9 ·
Finding specific volume and enthalpy of mercury
- jahanzebikram
- · Replies 5 ·
Calculating how many revolutions it takes to reach the final speed
- haven
- · Replies 10 ·
3 pulley problem with attached masses
- patric44
- · Replies 15 ·
Net torque about an axis through point A in a massless rod
- paulimerci
- · Replies 33 ·
How far will the bottom gate of a reservoir open?
- jackkk_gatz
- · Replies 56 ·
A dial can spin on a fixed rotational axis
- Danielheidarr
- · Replies 16 ·
A box with the mass m = 25 kg is sliding up a hill
- Danielheidarr
- · Replies 20 ·
What is the change in internal energy after two processes?
- Callmelucky
- · Replies 10 ·
A greater force? (A train engine pulling two identical cars)
- BurpHa
- · Replies 13 ·
Distance travelled by a falling body
- Bl4nk
- · Replies 6 ·
Is the Work Done by a Variable Force Non-Conservative?
- MatinSAR
- · Replies 59 ·
For which case would the applied force be greater?
- paulimerci
- · Replies 41 ·
What do input and output mean in physics problems?
- Jaccobtw
- · Replies 21 ·
Hop height of a rod and speed/ time if hit upward with force f
- MIKES279
- · Replies 1 ·
Power generated by this current source
- Guillem_dlc
- · Replies 3 ·
Force exerted on a pivot point of a rigid bar
- Gaeun Kim
- · Replies 8 ·
Finding Thévenin and Norton parameters with dependent sources
- Guillem_dlc
- · Replies 2 ·
Inelastic collision followed by circular motion
- Sal Coombs
- · Replies 2 ·
Calculate the angular momentum of this particle in rotational motion
- YanZhen
- · Replies 5 ·
Finding voltage across resistors when capacitor is fully charged
- Guillem_dlc
- · Replies 15 ·
Calculate new RPM after change in g-force in a centrifuge
- EFB
- · Replies 12 ·
Determine equivalent Young's Modulus
- vcsharp2003
- · Replies 17 ·
Find the Electric field at point p
- NotInMrPutmansClass
- · Replies 2 ·
Why is the Entropy of the Universe (total entropy) a path function?
- Jimyoung
- · Replies 8 ·
Find the charge of the sphere (q2)
- NotInMrPutmansClass
- · Replies 1 ·
Approximating Glucose as an Ideal Gas: Can We Calculate Entropy?
- Lambda96
- · Replies 2 ·
Maximum number of steel balls in a container
- hubot
- · Replies 20 ·
Initial Position Discrepancy Involving Fluid Resistance
- TRB8985
- · Replies 5 ·
Newton's Laws of motion -- Bicyclist pedaling up a slope
- paulimerci
- · Replies 73 ·
How to calculate magnetic induction just beyond the end of the magnet?
- Lotto
- · Replies 1 ·
Conservation of Energy with Mass on Hemisphere
- ccndy
- · Replies 6 ·
What is the smallest value of angular displacement of the raft?
- Lotto
- · Replies 54 ·
How does this system work? (Four pulleys and a rope lifting a mass)
- zuzelle
- · Replies 5 ·
Degrees of freedom with a particle and a rod
- Kaguro
- · Replies 26 ·
Can two objects moving parallel relative to a ground meet?
- Lotto
- · Replies 6 ·
What is the speed of the ball when it hits the ground?
- JaZZyCooL
- · Replies 8 ·
What is the difference between friction and rolling resistance?
- paulimerci
- · Replies 7 ·
Determining a centripetal force proportionality equation
- ova5676
- · Replies 9 ·
Hydrostatic pressure at a point inside a water tank that is accelerating
- songoku
- · Replies 60 ·
Why are the effects of a magnetized material neglected in this case?
- vcsharp2003
- · Replies 5 ·
Finding COM of L-Shaped Rod and Ball System
- March
- · Replies 3 ·
Solving a rotation problem in an inertial frame without pseudo-forces
- Spector989
- · Replies 24 ·
How are the poles of a tapered magnet distributed?
- vdance
- · Replies 2 ·
Calculate the minimum force required
- ALIAHMAD
- · Replies 51 ·
How do I find the coefficients of static friction and kinetic friction?
- katerowe
- · Replies 20 ·
Conservation of momentum and mechanical energy on an inclined plane
- Spector989
- · Replies 19 ·
Cutoff frequency for parallel plate waveguide with two dielectric regions
- warhammer
- · Replies 12 ·
Four very long, current carrying wires in the same plane
- penguinnnnnx5
- · Replies 3 ·
Static and Kinetic Friction -- Tilting a ramp until a block starts sliding
- Alaraity
- · Replies 11 ·
Sinking a cylinder with varying hole sizes
- lloydthebartender
- · Replies 97 ·
Why does an electron have minimum kinetic energy when its momentum is 2h/λ?
- blueberryRhyme
- · Replies 8 ·
Finding member forces in a 50 kN articulated frame
- Guillem_dlc
- · Replies 29 ·
Why Does the Electric Field Component Ex Require a Negative Sign?
- yesmale4
- · Replies 4 ·
Archived Magnetic Flux through a Cylinder
- xxkylexx
- · Replies 3 ·
Calculation of Electrostatic Potential Given a Volume Charge Density
- cwill53
- · Replies 6 ·
Finding force F_DB in a machine equilibrium problem
- Guillem_dlc
- · Replies 13 ·
Torques exerted on a vertical disk by multiple forces
- paulimerci
- · Replies 5 ·
How can the force of a normal reaction be electromagnetic?
- vcsharp2003
- · Replies 7 ·
How Are Beam Support Reactions Calculated?
- Guillem_dlc
- · Replies 3 ·
Kinematics of movement subject to a variable acceleration
- MatinSAR
- · Replies 13 ·
How do I solve a tension and torque problem without prior knowledge?
- marinarasauce
- · Replies 3 ·
Analysis of a Figure to Calculate Force and Moment
- Guillem_dlc
- · Replies 4 ·
Pushing on a spring connected to a block
- jolly_math
- · Replies 8 ·
Why doesn't mud fly off a spinning wheel backward?
- PhysicsRock
- · Replies 7 ·
Equilibrium of a rigid solid on a rod
- Guillem_dlc
- · Replies 9 ·
Determining Current and Voltage Drop in RLC Circuit
- theunbeatable
- · Replies 7 ·
Why does adding an external force change the spring compression distance?
- TkoT
- · Replies 7 ·
Determine the net torque acting about the center of mass
- paulimerci
- · Replies 7 ·
Kinetic energy of the Monster Hunter cannon
- earh1liw13w35sw5e
- · Replies 3 ·
Moment of inertia of T bar about 3 axes
- so_gr_lo
- · Replies 21 ·
Why does a diamagnetic rod align perpendicular to a magnetic field?
- vcsharp2003
- · Replies 8 ·
Coulomb's law — A negative charge balanced between 3 positive charges
- yesmale4
- · Replies 9 ·
Torque balance on a 4-mass wheel
- paulimerci
- · Replies 11 ·
Study of harmonic motion of a liquid in a V shaped tube
- sumatoken
- · Replies 2 ·
X-ray production and ionization energy
- SakuRERE
- · Replies 2 ·
Torques on a vertical wheel due to 3 masses spaced along the wheel rim
- paulimerci
- · Replies 13 ·
2 blocks and a spring, SUVAT and F=ma
- Ollz
- · Replies 4 ·
How does tension work in a rope or cable?
- Achintya
- · Replies 91 ·
Relative velocity passing a ball between two soccer players
- ekpm
- · Replies 5 ·
Firework explosion shrapnel angle from vertical
- Argonaut
- · Replies 11 ·
Tainter dam forces and center of pressure
- Guillem_dlc
- · Replies 10 ·
Find angles such that the motion travels a specific distance
- BurpHa
- · Replies 10 ·
Angular Velocity from KE, radius, and mass
- aivilo775
- · Replies 4 ·
Kleppner Kolenkow 2.34 (mass whirling around on a string)
- geoffrey159
- · Replies 15 ·
Inertia from four masses connected by massless rigid rods
- aivilo775
- · Replies 7 ·
Reduce the pressure in an air reservoir
- Guillem_dlc
- · Replies 17 ·
Two traveling waves g(x,t) = Asin(kx-wt) and h(x,t) = Asin(kx+wt+phi)
- blueberryRhyme
- · Replies 5 ·
Arrow on 30° incline: solving for launch angle
- Argonaut
- · Replies 6 ·
Calculating Energy Dissipation for a Moving Object Using Integral Calculus
- Arm
- · Replies 14 ·
Evaluating minimum and maximum values with calculations
- crememars
- · Replies 5 ·
Total force that a fluid exerts on a cylinder
- Guillem_dlc
- · Replies 2 ·
How do I incorporate electric fields into capacitors?
- MinaciousOviraptor
- · Replies 19 ·
Hollowed out sphere exerting gravitational force
- jolly_math
- · Replies 4 ·
Air wedge interference: why ignore reflections from top surface?
- Andrew Tom
- · Replies 1 ·
Why doesn't table height matter in spring-launched projectile problem?
- jolly_math
- · Replies 6 ·
Elevator falling and bouncing back from a spring
- jolly_math
- · Replies 1 ·
Two 70 kg skaters pulling 15 m rope toward each other
- VidsEpic
- · Replies 12 ·
Resultant force and centre of pressure in a tank
- Guillem_dlc
- · Replies 16 ·
Tetrahedron with 3 points fixed, and force applied to 4th
- SilasHokanson
- · Replies 11 ·