Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Threads
Newton's Second Law and Friction
- am13
- · Replies 1 ·
What is the minimum depth of snow needed to stop a paratrooper safely?
- patelkey
- · Replies 1 ·
Mechanical Energy loss due to NC Forces: two railroad cars collide.
- Senjai
- · Replies 2 ·
Calculating Work for Stacking Books on a Table
- laxboi33
- · Replies 2 ·
Calculating the Flowerpot's Fall Height
- mmoadi
- · Replies 10 ·
Maximum acceleration with friction equal to 90% of weight
- devin125
- · Replies 8 ·
Calculating Forces and Angles in a Conveyor Belt System
- Oblivion77
- · Replies 10 ·
Car merging to main road: can it really be so simple?
- mmoadi
- · Replies 2 ·
Drag force (air resistance) and acceleration
- nautikal
- · Replies 7 ·
Ball thrown vertically in air question?
- yamaha277
- · Replies 4 ·
Calculating Work Using W=f*d*Cos(theta)
- laxboi33
- · Replies 1 ·
Horizontal coefficient of restitution
- Psych Berry
- · Replies 5 ·
Non uniform circular motion of a disc
- dsimpson
- · Replies 2 ·
How many rotations of peddels per second?
- mmoadi
- · Replies 4 ·
Maxim velocity at the top of the loop (rollercoaster pb)
- shuby
- · Replies 4 ·
Electric field and potential of a sphere
- fluidistic
- · Replies 9 ·
Potential energy of an object with initial velocity.
- laxboi33
- · Replies 1 ·
Acceleration of clay on a potter's wheel
- fattydq
- · Replies 13 ·
What is the Minimum Force Needed to Move a Box Up a Frictionless Ramp?
- neutron star
- · Replies 4 ·
Acceleration of cart with hanging mass at angle theta
- greenskyy
- · Replies 5 ·
Dimensional alalysis to show functional dependence
- General_Sax
- · Replies 2 ·
Why aren't forces N and G equal?
- leatherneckpa
- · Replies 8 ·
Why is the collision angle 90 degrees in a 2d collision?
- SELFMADE
- · Replies 8 ·
Calculating Capacitance and Charge in Connected Capacitors
- tag16
- · Replies 2 ·
Stone thrown from cliff and car acceleration problems
- jimlee4262
- · Replies 6 ·
Leaving speed and distance after impact
- MechaMZ
- · Replies 2 ·
Understanding Potential Energy Function through Graph Analysis
- sonutulsiani
- · Replies 15 ·
Finding the net work done on an object
- Shyamalan
- · Replies 2 ·
What Is the Child's Acceleration Relative to the Ice?
- foreva_lynn
- · Replies 1 ·
Elastic Collision: Max Potential Energy Stored
- karis
- · Replies 5 ·
Comparing Current in two different wires
- aba3
- · Replies 4 ·
How Does Friction Affect Velocity on an Inclined Plane?
- yankeekd25
- · Replies 2 ·
Inclined Plane Force w/ Friction
- yankeekd25
- · Replies 2 ·
Heat Dissipation in Resistors: Does Direction Matter?
- sArGe99
- · Replies 4 ·
Elastic Collisions (Kinetic energy)
- Magma828
- · Replies 3 ·
Force to push a 2.7 kg wood box down a wall at 35°
- gbedenba
- · Replies 11 ·
Vectors Word Search: Understanding 23° True
- 312213
- · Replies 1 ·
How Long Does a Spin Take at 33 1/3 RPM?
- LifesHard
- · Replies 2 ·
An electron is shot directly away from a uniformly charged plastic sheet Find σ.
- nejibanana
- · Replies 3 ·
Basketball player shoots a ball, find angle, parametrics
- Pi Face
- · Replies 8 ·
Kinematics homework: velocity, acceleration, and distance formulas
- Obelix
- · Replies 5 ·
Center of mass of club-axe with stone and stick
- Zhalfirin88
- · Replies 1 ·
Block on a Pulley: Determine Speed 2s Later
- KillerZ
- · Replies 4 ·
Effective resistance between two points
- DarylMBCP
- · Replies 3 ·
What is out of the page and into the page mean in magentic field?
- Suy
- · Replies 13 ·
What is the Inductance of a Coil with Changing Magnetic Field and Current?
- JDiorio
- · Replies 5 ·
Work done shortening a rotating particle's string from Ro to R
- adeelrizvi
- · Replies 8 ·
Calculating Acceleration of Mass in Atwood Machine
- jti3066
- · Replies 7 ·
Ball Suspended from Ceiling (Uniform Circular Motion)
- Gotejjeken
- · Replies 5 ·
Studying half life and radioactive deca
- fizziksfan
- · Replies 1 ·
Mass spectrometer conceptual question
- clairez93
- · Replies 4 ·
Gravitation: Calculating Accel. Due to Gravity at 1.43x10^8 m
- gjax21
- · Replies 4 ·
What Was the Take Off Speed of the Bike Rider?
- Paul_H
- · Replies 1 ·
Calculating Change in Velocity of Ball from E to S
- DrDanger
- · Replies 2 ·
Work done by force accelerating helicopter upward at 0.10g
- Senjai
- · Replies 6 ·
Loss of rotational energy to thermal energy
- esalbred
- · Replies 4 ·
How do you measure acceleration in a car?
- fattydq
- · Replies 5 ·
Average acceleration from velocities in bearing notation
- roger911
- · Replies 4 ·
What is the work done by kinetic friction on a block sliding down a ramp?
- pdrjuarez
- · Replies 3 ·
Energy loss fraction when a hockey puck hits another at rest
- CaptFormal
- · Replies 5 ·
What is causing the tension to decrease?
- greenskyy
- · Replies 5 ·
Discharging Capacitor answer check
- latitude
- · Replies 3 ·
Tension in two wires at 50° and 45° supporting a picture
- oceanflavored
- · Replies 3 ·
Calculating Angular Momentum and Torque of a Mass in Freefall
- briteliner
- · Replies 3 ·
Calculating Drunk Driver's Speed in a Collision
- CaptFormal
- · Replies 3 ·
Tension in cables pulling a box
- oceanflavored
- · Replies 4 ·
Goldfish bowl index of refraction
- tiger1
- · Replies 1 ·
Weight of an 80.6 kg astronaut on Mars
- fattydq
- · Replies 6 ·
Photoelectric effect wavelength
- blindsided
- · Replies 3 ·
How many watts/how much intensity needed to power an elevator?
- Paulo Serrano
- · Replies 4 ·
An approximation for exponential.
- Alta
- · Replies 4 ·
How Do I Correctly Solve the Linear Equation tan 58 = (vi - ayt) / (axt)?
- Osbourne_Cox
- · Replies 19 ·
Variation of gravity with height
- KBriggs
- · Replies 1 ·
Two stones dropped from a bridge with different start times
- emyt
- · Replies 7 ·
What Went Wrong in My Free-Body Diagram?
- oceanflavored
- · Replies 2 ·
Find mass of mars given period of moon orbit and radius of orbit
- buttermellow
- · Replies 1 ·
Finding Acceleration in Two-Dimensional Kinematics
- indietro
- · Replies 9 ·
Kinematics: Velocity and Distance of a Tennis Ball
- Fedor
- · Replies 2 ·
Finding launch angles for water to reach a window 20 m high and 60 m away
- lavenderbaby
- · Replies 4 ·
Two dimensional kinematics (component velocity)
- indietro
- · Replies 1 ·
Two trains and straight line movement
- mmoadi
- · Replies 4 ·
Calculating Acceleration of Disks Welded Together
- kudoushinichi88
- · Replies 2 ·
Maximum speed of smaller mass in trebuchet with stiff rod and two masses
- semc
- · Replies 5 ·
Tension at the middle of a string of known mass
- natnat_nuts
- · Replies 2 ·
Find Charge in Sphere: Integrate \rho(r)
- YoGabbaGabba
- · Replies 3 ·
How Many Photons Does the Sun Emit Daily?
- jpartdq
- · Replies 3 ·
Solving Lens Makers Formula: Image Location @ 500cm o, f=50cm
- jpartdq
- · Replies 1 ·
Why does a floating body displace water equal to its weight?
- fawk3s
- · Replies 13 ·
Circuit analysis - finding resistance
- sArGe99
- · Replies 2 ·
Work done by a constant force question
- farleyknight
- · Replies 4 ·
Calculating Mechanical Energy Lost Due to Friction on Inclined Plane
- Amel
- · Replies 5 ·
Stopping Distance for 25000kg Train Traveling at 18m/s: Conductor's Dilemma
- xbebegirlx
- · Replies 1 ·
Find Velocity with only range given.
- Jimkatz809
- · Replies 1 ·
Find initial Velocity with only distance, angle, and acceleration.
- Jimkatz809
- · Replies 5 ·
Calculate Velocity of Particle at t=0.657s
- waldvocm
- · Replies 4 ·
Does the emf of a battery remain its specified value for a long time?
- sArGe99
- · Replies 1 ·
Average velocity vs instantaneous velocity at midpoint for constant acceleration
- Labeeb
- · Replies 4 ·
Free fall and one other question
- wonger
- · Replies 1 ·
What Is the Drag Force on a Sky Diver at Different Speeds?
- africanmasks
- · Replies 3 ·
Find the maximum potential difference that can be applied to a capacitor
- staticd
- · Replies 3 ·