Free resources for Mechanics in Physics: lessons, PDFs and video courses. Mechanics study material for GCSE, A-Level, AS-Level, 11+ with Khan Academy, Wikipedia and video solutions.
Mechanics is the branch of physics that studies motion and the forces that cause it, built on Newton's three laws. The first law (inertia): an object keeps its state of rest or uniform motion unless acted on by a net force. The second law: F = ma — net force equals mass times acceleration. The third law: every action has an equal and opposite reaction.
Kinematics describes motion with displacement, velocity, and acceleration. Key equations for constant acceleration: v = u + at, s = ut + ½at², v² = u² + 2as. On velocity-time graphs, the slope gives acceleration and the area under the curve gives displacement — the most common exam graph question.
Mechanics dominates AP Physics 1, A-Level Physics, and university entrance exams worldwide. Classic problem types include projectile motion, inclined planes, friction, circular motion, and momentum conservation. Drawing a free-body diagram before writing any equation is the single best habit for solving force problems.
Pick the correct answer — instant feedback!
1. Which equation expresses Newton's second law?
2. The slope of a velocity-time graph gives:
3. In free fall (no air resistance), acceleration equals:
F = ma: the net force acting on an object equals its mass multiplied by its acceleration.
It represents displacement — the total change in position over that time interval.
A sketch showing all forces acting on a single object, used to set up Newton's second law equations correctly.
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