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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Two masses are connected by a string and pulled along a frictionless surface by anoth
- Ahmad786
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What is Newton's First Law of Motion?
- Ahmad786
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Calculating Work Against Gravity for Orbital Launch
- sour_lemon_1k
- · Replies 4 ·
Paraxial approximation on concave mirror
- zicron
- · Replies 7 ·
Determining the Internal Resistance of Battery X
- songoku
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What exactly is current, and how come it is constant in a circuit?
- rhfish
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How far from camera person should stand?
- agentas
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Calculating Mass from Weight and Distance
- majormuss
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Calculate radius of earth using a pole
- Mk
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Solving Frictional Force on Ladder
- Power of One
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Calculate the number of moles in a real gas
- larsb
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Magnetic Forces acting upon a slider on rails
- Peto
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What is the direction of forces exerted on a plank by a wall in statics?
- nahanksh
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Finding Speed Needed to Keep Particle on Rippled Surface
- No Name Required
- · Replies 9 ·
Leakage Resistance of 100pF Capacitor with Mica Dielectric
- Kev1n
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What does the triangle symbol mean in the power equation?
- r1ch412d
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Answer Mech Energy of 32kg Cannon Ball at Max Height
- therest
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Why is High Transition Probability Important in Semiconductor Lasers?
- kpstp88
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How Do You Calculate Distance and Direction Using the Law of Cosines?
- finfanrb23-rw
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Elastic pendulum energy problem
- holezch
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2D Kinematics problem (hill projectile)
- madeeeeee
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Conceptual questions involving electricpotential
- tsh44
- · Replies 2 ·
Sketching a velocity-time graph for a car at traffic lights
- madeeeeee
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How Do I Know the Following Equations is Dimensionally Correct?
- JustSomeGuy80
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How Do Speed and Direction Change for Two Colliding Pool Balls?
- kapil1089thek
- · Replies 3 ·
Equivalent Capacitance of a network
- Canopuswr
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1 dimentional kinematics problem. due in 5 hours
- the guy
- · Replies 1 ·
Physics Kinematics: Larry's Peach
- lilwigz
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If you halve the radius of a planet what happens to the volume/mass/density ?
- Yehia11
- · Replies 4 ·
Porsche challenges a Honda acceleration
- Zhalfirin88
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How to Solve Basic Physics Problems Correctly?
- Ahmad786
- · Replies 1 ·
Work done by a spring in a swinging motion
- holezch
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Image distance and height for nearsighted person viewing tree through contacts
- runfast220
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Calculate the power temperature
- JQ10
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What are the velocities of the balls after an elastic collision?
- lemon
- · Replies 18 ·
Calculating Charge and Electron Count of Dust Particle in Electric Field
- Kourtney0115
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Standing on the top ledge of a 55 meter high ?
- xterminal01
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What is the relationship between wavelength and frequency?
- Samurai Weck
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What is the Power Calculation for Moving Up an Inclined Plane at Constant Speed?
- Ideologue
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Maximum distance for person to walk on object in equilibrium?
- Fanta
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Kinematics/calculating a line from a curve?
- fruitbowl
- · Replies 3 ·
Electric force between two point charges
- slugbunny
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How Do You Calculate the Mass of a Particle in an Electric Field?
- krony23
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Find Spring Constant: Prove 1/K_eff = 1/k_1 + 1/k_2
- Fanta
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Finding string mass from pulse speed and tension
- Samurai Weck
- · Replies 3 ·
What is the displacement from Dallas to Chicago using a flat Earth model?
- sneeterpop
- · Replies 3 ·
How Do Natural Frequencies Arise in a Clamped Metal Rod?
- bleedblue1234
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Ball thrown upward at 50 m/s: finding time, distance, and acceleration
- Player7900
- · Replies 15 ·
Calculating Mass Using Electric Field and Force Equations
- krony23
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How Do PV Diagrams Illustrate the Behavior of Ideal Gases?
- JQ10
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What is the change in internal energy of the water
- Kristmas
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Question on Natural Frequencies
- bleedblue1234
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Verifying Nuclear Binding: Is it True and How Far Can it Go?
- look416
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What is the relationship between the angular velocities of two connected gears?
- cshelmo
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Why Is My Calculation for the X Component of the Vector Sum Incorrect?
- STEF2098
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Vectors in spherical coordinates
- eoghan
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What is the Mass of Air in a Cylindrical Column as a Function of Height?
- ~Sam~
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Projectile motion question and minimum initial speed
- justsomebody
- · Replies 17 ·
Collision of a mass with a stick
- conana
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How Does Projectile Momentum Affect Block Movement?
- mc8569
- · Replies 11 ·
Clarifying the Cooling Stages of a Carnot Engine
- tiredryan
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Mass of sphere with density ρ(r) = ρ0(1 − r/R)
- ~Sam~
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What is the Point of Zero Electric Field?
- Keithkent09
- · Replies 13 ·
Energy required to transfer an object to a higher orbit
- wrongusername
- · Replies 4 ·
Why is Gravity Considered Positive in Applications of Newton's Laws?
- rambo5330
- · Replies 2 ·
Projectile Motion of Soccer Ball Problem
- Precursor
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Normal force on a banked curve?
- platina
- · Replies 9 ·
How does a FTIR machine operate?
- physical101
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Does eVo Equal Maximum Kinetic Energy in the Photoelectric Effect?
- thefifthlord
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Projectile Motion - given angle, time; need displacement
- jahrollins
- · Replies 6 ·
Finding resistivity from the y-intercept of an L/R vs. L graph
- Deliria
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Magnetic field produced by two side by side wires - when do they cancel?
- Greywolfe1982
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Find Initial Velocity of Cannonball Fired from Cannon
- themadhatter1
- · Replies 8 ·
Is my speed calculation correct?
- madeeeeee
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How Is Coefficient of Restitution Used in Car Accident Reconstruction?
- Krazykaveman
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Deriving the elastic collision formulas for two objects
- GreenPrint
- · Replies 8 ·
Friction and tensions with two blocks on a string on an incline
- rnien
- · Replies 4 ·
Wavelength with P/Q exponent equation-solve for P/Q
- afg_91320
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What Causes the Doppler Shift John Experiences?
- asl3589
- · Replies 3 ·
Cannon recoils 6.1 cm in 0.0218 s after firing tennis ball
- zelda1850
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Finding Initial Velocity in Projectile Motion at an Angle
- science_rules
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Finding the initial velocity of a projectile, given time, an angle, and distance
- science_rules
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How High Did the Basketball Player Jump?
- majormuss
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What is the speed of the 100g ball in Newton's Cradle after being lifted 3.0cm?
- madeeeeee
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Vector resultant help
- 02drai
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Max angular velocity when spring released from 360° twisted position
- physicsfun_12
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Finding refractive index from total internal reflection circle
- johndoe
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Friction force and coefficent of friction
- zelda1850
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What Phase Difference Leads to the Largest Amplitude?
- kavamo
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What is the Time for an Object to Fall into the Sun Using Dimensional Analysis?
- Fanta
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Angular Acceleration of Electric Motor
- physicsfun_12
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What is the Direction of the Net Force in this Loop?
- chronicals
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Calculating Distance Traveled with Friction and Velocity
- Onebetter
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Three balls thrown at different angles: comparing trajectories and final speeds
- squintyeyes
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How Is Torque Calculated on a Dipole in an Electric Field?
- swimmer052005
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Ξ cm = 4.9 sin (1.06 x - 0.77 t) - Determine Travelling Speed of Wave
- 05holtel
- · Replies 3 ·
How Do You Calculate Electron Velocity in a Hydrogen Atom?
- Wildcatfan
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How do you find the velocity with only the following given information?
- aamir23
- · Replies 3 ·
Finding an angle of a projectile for a specific distance
- trexmatt
- · Replies 1 ·
Finding spring constant k when 2 kg rock reaches 500 m height
- themadhatter1
- · Replies 3 ·