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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Conservation of Energy roller coaster car
- kiwikahuna
- · Replies 5 ·
Inelastic collision and spring compression problems
- xyoonboixkpx
- · Replies 6 ·
Simple harmonic motion of a body question
- srj200
- · Replies 4 ·
Emission lines vs blackbody radiation glow
- taoke
- · Replies 1 ·
How Do You Calculate the Correct Vertical Velocity Component of a Projectile?
- physicsnewby
- · Replies 22 ·
How Do You Calculate the Minimum Radius and Bank Angle for a Road Curve on Ice?
- Seiya
- · Replies 9 ·
Why Is My Reasoning Incorrect for the Current in the Resistor?
- natugnaro
- · Replies 2 ·
Momentum of a Doubled Cannonball with Doubled Velocity
- chella
- · Replies 2 ·
Calculating Force Applied to Input Piston in Hydraulic System
- mike2007
- · Replies 5 ·
Max speed and spring compression for 10 kg object on frictionless incline
- physicsnewby
- · Replies 8 ·
Calculating a product and quotient in scientific notation
- camboguy
- · Replies 3 ·
Spaceship ferrying workers to Moon Base problem
- 123 GO!
- · Replies 3 ·
Bomb dropped from aircraft at 4000m with initial velocity 50 m/s at 30°
- logzero
- · Replies 16 ·
Does the block's weight affect the cart's acceleration when pulled?
- gyshalom
- · Replies 4 ·
Help! Direction of Torque in Equilibrium Problems
- kiwikahuna
- · Replies 1 ·
Calculating Outward Force of a Tornado on a Wall
- kiwikahuna
- · Replies 5 ·
Confusion with Hailstone Collision Momentum Calculation
- kiwikahuna
- · Replies 4 ·
What is the magnitude of buoyant force acting on the block?
- mike2007
- · Replies 9 ·
What is the speed of the released softball in circular motion?
- Steveku
- · Replies 9 ·
What is the buoyant force acting on the rock?
- mike2007
- · Replies 2 ·
Inclined ramp, object moving down towards spring
- UppityHorse
- · Replies 3 ·
Deriving centrifugal force with vector triple product
- lets_resonate
- · Replies 4 ·
Young's Modulus Calculation for Nylon Rope Cross Sectional Area
- kiwikahuna
- · Replies 2 ·
Finding centre of gravity and calculating moments on a balanced tray
- crpcrpcrp
- · Replies 4 ·
Momentum of falling objects on impact; p = mv not working?
- exi
- · Replies 11 ·
What is the Precession Frequency of a Rotating Bicycle Wheel?
- kiwikahuna
- · Replies 2 ·
Thermal energy in a sample of candle wax?
- crpcrpcrp
- · Replies 1 ·
How long does it take for the train to stop moving?
- blader324
- · Replies 9 ·
Finding the magnetic field from electron motion in crossed E and B fields
- jesuslovesu
- · Replies 3 ·
What Are the Approximate Wavelengths of Different Colors?
- prasanaharani
- · Replies 2 ·
What Is the Boat's Average Acceleration, Velocity, and Displacement?
- suxatphysix
- · Replies 4 ·
How to maximize your height in a basketball jump shot?
- nophun6
- · Replies 14 ·
Conservation of momentum and wood ball problem
- Amria
- · Replies 1 ·
How to apply Kepler's laws and their relation to Newton's law of universal gravitation
- Gear300
- · Replies 4 ·
Moment of inertia for a cylinder at a distance from rotation axis
- pinodk
- · Replies 1 ·
Flywheel and falling mass energy conservation equation
- WildFlower
- · Replies 1 ·
Determine how high the ball is (from the ground)
- Demonsthenes
- · Replies 1 ·
How Do You Calculate Final Temperatures in an Adiabatically Isolated Cylinder?
- ginger_jj
- · Replies 1 ·
Find the unit vector perpendicular to a and b
- anantchowdhary
- · Replies 8 ·
Standing Waves in Strings: Examining Amplitude, Node Number, and Wave Speed
- BMWPower06
- · Replies 5 ·
Are the Equations for Normal Force on an Inclined Plane the Same?
- Gear300
- · Replies 4 ·
Reading the position - time graph:
- Edwardo_Elric
- · Replies 5 ·
Average acceleration of an astronaut
- Edwardo_Elric
- · Replies 2 ·
How Does a Single-Phase Generator Calculate EMF?
- danago
- · Replies 1 ·
Conservation of momentum on bike
- Momentum09
- · Replies 2 ·
Creative Questions on Magnetism
- enadiz
- · Replies 12 ·
Plane velocity with 200 km/h airspeed and 50 km/h west wind
- SkipToMaLou
- · Replies 1 ·
What is Ball B's Speed After an Elastic Collision with Ball A?
- stathike
- · Replies 17 ·
Solving Sound Intensity with 2 Shut-Off Engines
- physicsnewby
- · Replies 4 ·
Wavelength of photon from hydrogen electron transition n=6 to n=3
- Fiza43
- · Replies 2 ·
Pendulum torque: should theta be the angle with vertical or 90 degrees minus that?
- kiwikahuna
- · Replies 5 ·
Compton Effect: Finding Final KE of Electron
- stinger302
- · Replies 2 ·
Work to pump water from a hemispherical tank
- norcal
- · Replies 1 ·
Very basic acceleration question (typo?)
- mujadeo
- · Replies 1 ·
How Do You Calculate the Inclination of a Hill and Acceleration of a Cyclist?
- zawhein
- · Replies 2 ·
How Is the Beat Frequency Calculated When a Train Approaches a Station?
- physicsnewby
- · Replies 1 ·
Reading acceleration vs. time graphs
- exi
- · Replies 7 ·
Finding the Mass of a Meter Stick Using Torque Equations
- hiddenlife5009
- · Replies 3 ·
Displacement, time and average velocity
- Equilibrium
- · Replies 1 ·
Falling to Earth from 100,000 Miles - Can You Die by Impact?
- Evil_Klown
- · Replies 4 ·
What Is the Average Speed of a Rabbit in a 4 km Race?
- rash219
- · Replies 6 ·
Potential + Kinetic Energy Question
- NDiggity
- · Replies 4 ·
What fraction of air molecules leave when furnace heats house from 16°C to 20°C?
- pyizzle
- · Replies 2 ·
How to Calculate the Time and Weight of a Ball Rolling Down a Ramp
- hover
- · Replies 10 ·
How Can an Electron Microscope Manipulate an Electron Beam in 2D Motion?
- spizma
- · Replies 2 ·
What is the electro-static energy of a sphere with uniform charge density?
- Parallel
- · Replies 3 ·
RC circuit charging with capacitor, resistor and battery
- CathyLou
- · Replies 3 ·
How does Bernoulli's principle explain blowing a dime across a table?
- alik
- · Replies 1 ·
RMS Voltage with a DC Offset: What is the Impact?
- flash
- · Replies 1 ·
How Is Air Pressure Calculated at the Center of a Hurricane?
- physicsnewby
- · Replies 13 ·
Why max car acceleration on a plane equals coefficient of friction times g
- physicsA380
- · Replies 5 ·
Rotational acceleration on merry go round
- mike2007
- · Replies 1 ·
Conservation of energy between the mass and the spring
- Momentum09
- · Replies 1 ·
Angular acceleration, friction, and turntables
- exi
- · Replies 17 ·
What Are Field Lines in Vector Fields?
- imy786
- · Replies 3 ·
Finding vector components perpendicular to a given vector with magnitude 4.5 m
- snoggerT
- · Replies 10 ·
Solving a Horizontal Arc HW Problem: Centripetal Acceleration
- exi
- · Replies 3 ·
Standing Waves on a String: True or False?
- BMWPower06
- · Replies 2 ·
Circular Motion of Car in Vertical Bridge
- hardyivan007
- · Replies 7 ·
How does wind acceleration affect the speed and direction of a sailboat?
- ere
- · Replies 5 ·
Length contraction & time dilation
- monp
- · Replies 10 ·
Attraction and Repulsion Forces Between Magnets
- eek3386
- · Replies 4 ·
Questions about principle of moments
- crpcrpcrp
- · Replies 2 ·
Can coefficient of friction between surfaces be greater than 1?
- gandharva_23
- · Replies 6 ·
Can you define inertial reference frames without Newton's laws?
- lets_resonate
- · Replies 16 ·
How Do You Calculate the Tension in a Rope Holding a Leaning Beam?
- Fusilli_Jerry89
- · Replies 1 ·
Block going up a frictionless incline
- Momentum09
- · Replies 1 ·
What is Snell's Law and How is it Used?
- grscott_2000
- · Replies 3 ·
How Much Heat to Turn Ice at -10°C into Water at 20°C?
- navy_bison
- · Replies 5 ·
Why Does Friction Act Towards the Center in Circular Motion?
- Gunman
- · Replies 6 ·
Max speed on 20m curve without skidding or overturning
- Sparky500
- · Replies 6 ·
Inclined ramp inside an accelerating train
- jul_greenberg
- · Replies 5 ·
What is the mass of the planet?
- Unknown221
- · Replies 10 ·
What is the magnitude of the vector product?
- Equilibrium
- · Replies 10 ·
Acceleration of object in a moving lift
- Kushal
- · Replies 3 ·
Can AC Motors Function as AC Generators Just Like DC Systems?
- unique_pavadrin
- · Replies 3 ·
Changing String Frequency: Thinner/Thicker/Longer/Shorter/Tighter/Looser?
- BMWPower06
- · Replies 4 ·
Calculate the percentage difference
- physicsnewby
- · Replies 4 ·
Find the spring constant 'k' by using the slope of my graph
- physicsnewby
- · Replies 4 ·