Most introductory physics comes down to a handful of formula families. Here are the ones that solve the majority of problems — grouped by topic — plus a free app that works any problem step by step from a photo.
Free on iOS · Step-by-step solutions from a photo
Learn these four groups and you can attack most problems you’ll meet.
Motion: v = u + at, s = ut + ½at², v² = u² + 2as. The backbone of every mechanics problem.
F = ma, W = Fd, KE = ½mv², PE = mgh. Newton’s laws and the work–energy theorem.
V = IR, P = VI, and series/parallel resistance rules for circuit problems.
PV = nRT, Q = mcΔT. Gas laws and heat transfer for thermal problems.
List known quantities with units and pin down exactly what the question wants.
Kinematics, forces, energy, circuits, or heat — the topic points to the formula family.
Match the knowns and the unknown to a formula that connects them.
Rearrange, substitute, and carry units through — the final unit confirms the answer.
Snap the problem in Physics AI for a full worked solution and verify your method.
Physics AI reads any physics problem from a photo and shows the full step-by-step solution — the formulas used and the reasoning at each step, so you learn the method.
List what is given and asked, identify the topic, choose the formula linking knowns to unknown, then solve while carrying units. Physics AI shows this full worked process from a photo.
The kinematics equations (v = u + at), Newton’s second law (F = ma), work and energy (W = Fd, KE = ½mv²), Ohm’s law (V = IR), and the ideal gas law (PV = nRT) cover most introductory problems.
Yes. Physics AI reads a problem from a photo and produces a step-by-step solution with the formulas and reasoning at each step — so you learn the method, not just the answer.
Physics AI is free on iOS. Scan a problem for worked solutions, practice problems, and formula sheets across mechanics, thermodynamics, and electromagnetism.