Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Threads
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 ·
Calculating Replacement Resistance Rv (Ohm)
- SD43
- · Replies 7 ·
Converting W²/NJHz·t to SI base units
- SkipToMaLou
- · Replies 4 ·
Finding moles, temperature and pressure for 200g CO2 sample
- uniidiot
- · Replies 8 ·
Point charge and electric potential
- uniidiot
- · Replies 2 ·
Calculating Acceleration and Velocity of a Weather Rocket Launch
- ere
- · Replies 10 ·
Changing position in circular motion
- alik
- · Replies 3 ·
Coulomb force vectorial and non-vectorial forms
- black_kitty
- · Replies 1 ·
How Do You Calculate the Density of a Diffraction Grating?
- kinst
- · Replies 2 ·
What is the time constant for an RC circuit discharging?
- t_n_p
- · Replies 15 ·
What Is the Relationship Between Friction and Heat?
- black_kitty
- · Replies 2 ·
Potential Energy Function and Force
- kiwikahuna
- · Replies 1 ·
Calculating Extra Work for Hooke's Law Spring
- Momentum09
- · Replies 1 ·