If you are stuck on a problem set and typing “do my physics homework” into a search bar, here is how it works on HomeworkDoer: post the assignment, compare bids from qualified physics tutors, and choose the one who will deliver a worked solution you can follow line by line.
It covers algebra-based and calculus-based courses, AP and college physics, and everything from kinematics to circuits and optics. If you need physics homework help on a deadline, or physics assignment help that explains why each step is done, you set the deadline and a budget range and tutors respond with their price.
A good physics solution is more than a final number. It draws the diagram, names the principle, writes the equation before substituting, carries units through every line, and checks that the answer is sensible. Read how HomeworkDoer works for the full process.
What We Can Help With: Physics Topics, Courses and Platforms
Physics help on HomeworkDoer runs from a first high school course to upper-level undergraduate physics.
Topics and Courses
- Mechanics: kinematics, projectile motion, Newton’s laws, friction, circular motion, work and energy, momentum and collisions, rotation, torque and static equilibrium.
- Gravitation and oscillations: orbits, Kepler’s laws, springs, simple harmonic motion and pendulums.
- Electricity and magnetism: Coulomb’s law, electric fields, Gauss’s law, potential, capacitors, DC circuits, magnetic fields, induction and AC circuits.
- Waves and optics: sound, standing waves, the Doppler effect, reflection, refraction, lenses, mirrors, interference and diffraction.
- Thermodynamics: temperature, heat, calorimetry, ideal gases, the first and second laws, heat engines and entropy.
- Modern physics: special relativity, the photoelectric effect, atomic models, quantum basics and nuclear decay.
- Course types: AP Physics 1, 2 and C, college physics, university physics, engineering physics and physics for life sciences.
Platforms and Deliverables
- Mastering Physics and WebAssign: worked solutions for the problems in your assignment, with the reasoning written out so you can enter your own answers.
- Lab reports: data tables, uncertainty, graphs, analysis and conclusions.
- Tools: Excel or Python for data fitting, graphing calculator steps, and PhET-style simulation write-ups.
A Worked Example: Block on an Incline with Friction
Inclined planes show up in nearly every first-semester course, and they are where a missing free-body diagram costs the most points. Here is the solution as a tutor would write it.
Problem. A 5.0 kg block is released from rest at the top of a 30° incline. The coefficient of kinetic friction between block and surface is 0.20. The block slides 4.0 m down the slope. Find its acceleration, its speed at the bottom and the time it takes. Use g = 9.8 m/s².
- Draw the free-body diagram. Three forces act on the block: weight W = mg straight down, the normal force N perpendicular to the surface, and kinetic friction f pointing up the slope, opposite the motion.
- Choose axes along the slope. Let +x point down the incline and +y point perpendicular to it, away from the surface. Now only the weight needs to be split into components.
- Resolve the weight. W = (5.0)(9.8) = 49.0 N. The component along the slope is W sin 30° = 49.0 × 0.500 = 24.5 N, and the component into the surface is W cos 30° = 49.0 × 0.866 = 42.4 N.
- Apply Newton’s second law perpendicular to the slope. There is no acceleration in this direction, so N − W cos 30° = 0 and N = 42.4 N.
- Find the friction force. f = μk N = 0.20 × 42.4 = 8.49 N.
- Apply Newton’s second law along the slope. W sin 30° − f = ma, so 24.5 − 8.49 = 5.0a. The net force is 16.0 N and a = 3.20 m/s² down the incline.
- Use kinematics for the speed. With v0 = 0, v² = 2ad = 2 × 3.20 × 4.0 = 25.6, so v = 5.06 m/s.
- Find the time. t = v ÷ a = 5.06 ÷ 3.20 = 1.58 s.
The mass cancels if you write the equation in symbols: a = g(sin θ − μk cos θ) = 9.8 × (0.500 − 0.20 × 0.866) = 3.20 m/s². That shortcut is worth knowing, but most instructors want to see the force components first.
Check with energy. Gravity does 24.5 N × 4.0 m = 98.0 J of work and friction removes 8.49 N × 4.0 m = 33.9 J. The difference, 64.1 J, should equal the kinetic energy: ½(5.0)(5.06)² = 64.0 J. The tiny gap is rounding, so both methods agree.
Final answer: a = 3.20 m/s² down the slope, v = 5.06 m/s at the bottom, t = 1.58 s. A useful sanity test: once moving, the block keeps speeding up only if tan θ is greater than μk, and tan 30° = 0.577 is well above 0.20, so a positive acceleration makes sense.
The same method works for any incline problem, with or without friction. If you want to see how the friction model is derived, the OpenStax University Physics chapter on friction walks through static and kinetic friction with more examples. Note that many textbooks use g = 9.80 m/s², while the standard value defined by NIST is 9.80665 m/s². Always use the value your course specifies, because autograded answers are often checked to three significant figures.
Do My Physics Homework: How It Works
- Post the assignment. Upload the problem set, your lab handout or screenshots of the online questions, plus the rubric. Choose the subject, academic level, deadline and a budget range, and mention your course type, such as algebra-based or calculus-based, and the value of g or notation your instructor uses.
- Compare bids from physics tutors. Qualified tutors send a price and a message. Check each tutor’s profile, rating and reviews, and chat with them about how they will lay out the solution before you choose.
- Pay and track progress. Pay for the bid you accept at checkout, then follow progress from your dashboard and send extra files, such as lab data or lecture notes, if your tutor asks for them.
- Review the solution. The tutor delivers through your dashboard. Check the diagrams, equations, units and final answers against your instructions, and request a revision if anything is missing or unclear.
- Study it and keep it. Download the files and work through each step. If a revision does not fix a problem, you can open a dispute, and support is available by live chat.
Pricing: What It Costs to Pay Someone to Do My Physics Homework
There is no fixed price list. When you post, you pick a budget range: $20–30, $30–60, $60–100, $100–150, $150–250, $250–450, $450–700, $700–1,000 or $1,000–2,000. Tutors then bid with their own price, so you see real quotes before you pay anything, and you pay only for the bid you accept. These factors move the price most:
- Number and length of problems: five kinematics questions take far less time than a full set of rotational dynamics problems.
- Course level: calculus-based mechanics, electromagnetism with Gauss’s law or upper-level courses need deeper expertise than an introductory algebra-based course.
- Deadline: a 12-hour turnaround narrows the pool of available tutors and usually costs more than a one-week deadline.
- Write-up: answers alone take less time than full solutions with free-body diagrams, or than a lab report with uncertainty analysis and graphs.
- Format: online homework with many short parts can take longer than it looks, because every sub-question needs its own worked step.
Posting early, with the full question text and your class notes attached, usually brings more bids and more choice on price.
Why a Physics Expert Instead of an AI Answer
AI tools can produce a confident-looking physics solution in seconds, but physics is graded on setup, not just on the last line. A tutor who knows the subject can:
- Draw the correct diagram first. Most wrong answers start with a missing force, a friction force pointing the wrong way, or a sign convention that changes halfway through.
- Pick the right principle. Some problems are faster with energy conservation than with forces, and collision problems need momentum, not energy, when the collision is inelastic.
- Keep units and significant figures straight. A wrong unit conversion, such as using centimeters in a formula that expects meters, is one of the most common reasons an online homework answer is marked wrong.
- Match your course. Algebra-based and calculus-based courses solve the same problem differently, and tutors follow the method and notation your textbook uses.
- Explain and stand behind the work. You can ask follow-up questions in chat, and the tutor will revise the work if it misses your instructions.
Mechanics and Kinematics Homework Help
Mechanics is where most physics courses start and where most points are lost. Kinematics problems look simple until a projectile is launched from a cliff or two cars start at different times. A tutor will set up a clear coordinate system, list the knowns and unknowns, pick the kinematic equation that contains exactly one unknown, and keep the signs consistent from start to finish.
- One- and two-dimensional motion: displacement, velocity and acceleration graphs, free fall, and relative motion.
- Projectile motion: splitting the launch velocity into components and treating horizontal and vertical motion separately, as shown in the OpenStax projectile motion section.
- Forces and Newton’s laws: free-body diagrams, tension in pulley systems, friction, and circular motion with centripetal acceleration.
- Energy and momentum: the work-energy theorem, conservation of energy with and without friction, impulse, and elastic and inelastic collisions.
- Rotation: torque, moment of inertia, rolling motion and angular momentum.
Calculus-based mechanics adds derivatives and integrals, such as finding velocity from a position function or work from a variable force. If the math is the sticking point rather than the physics, our math homework help covers the calculus behind it.
Electricity and Magnetism Assignment Help
Electricity and magnetism is the second half of most physics sequences, and it is more abstract: fields, potentials and flux are harder to picture than a block on a ramp. Physics assignment help here focuses on setting up the right law for the geometry of the problem.
- Electrostatics: Coulomb’s law with vector addition, electric fields of point charges and continuous distributions, and Gauss’s law for spheres, cylinders and planes.
- Potential and capacitance: potential difference, equipotentials, capacitors in series and parallel, and dielectrics.
- Circuits: Ohm’s law, resistors in series and parallel, and multi-loop circuits solved with Kirchhoff’s rules, as in the OpenStax section on Kirchhoff’s rules, plus RC circuits.
- Magnetism and induction: magnetic force on charges and wires, the Biot-Savart law, Ampère’s law, Faraday’s law and Lenz’s law.
AP Physics and Calculus-Based Physics
AP Physics 1 and 2 are algebra-based, while AP Physics C uses calculus for mechanics and for electricity and magnetism. The College Board’s AP Physics 1 course page lists the units and science practices the exam tests, and AP free-response questions reward clear reasoning and labeled diagrams as much as final numbers. Tutors can work through practice problems in the style of the exam, explain the reasoning the rubric looks for, and help you prepare for unit tests.
In college, university physics courses for engineering and physics majors use calculus throughout, while college physics courses for life science majors stay algebra-based. Tell your tutor which one you are taking, because the expected method differs.
Physics Lab Reports and Data Analysis
Lab reports are graded on analysis, not just on whether your numbers match the textbook. A strong report states the purpose, describes the method briefly, presents data in clear tables, graphs the relationship being tested, calculates percent error or uncertainty, and explains sources of error honestly.
- Graphs and fits: linear fits to find a slope with physical meaning, such as g from a pendulum or the spring constant from Hooke’s law.
- Uncertainty: propagating measurement uncertainty and comparing your result with the accepted value.
- Simulations: write-ups for virtual labs that use tools such as the PhET interactive simulations from the University of Colorado Boulder.
- Code: data analysis in Excel or Python; for longer scripts, see our programming homework help.
Mastering Physics and WebAssign Help
Online platforms such as Mastering Physics and WebAssign randomize the numbers in each problem and often allow limited attempts. Tutors work through the problems in your assignment with the reasoning written out, so you can follow the method and enter your own answers. That approach also prepares you for exams, where there is no one to ask.
Physics overlaps with other sciences, too. Thermodynamics and quantum topics also appear in physical chemistry, so if your problem set crosses into reaction energetics or spectroscopy, see our chemistry homework help.
Get Physics Homework Help Today
Whether you need one tricky circuit problem explained or a full problem set solved step by step, you can post it in a few minutes. Attach the questions and any notes from your instructor, set your deadline and budget range, and compare bids from physics tutors before you pay.
Post your physics homework now and get a worked solution that shows the diagram, the physics behind each step and the units in every line.
