⚡ 1. Mechanics & Kinematics

Kinematics is the study of motion without considering the causes of motion.

Key quantities: displacement (s), velocity (v), acceleration (a), time (t).

SUVAT equations: v = u + at, s = ut + ½at², v² = u² + 2as, s = ½(u+v)t.

Velocity-time graphs: gradient = acceleration, area under graph = displacement.

Average speed = total distance / total time. Instantaneous velocity is the velocity at a specific moment.

Acceleration is the rate of change of velocity. Deceleration is negative acceleration.

Free fall: objects fall with acceleration g = 9.81 m/s² (neglecting air resistance).

Terminal velocity is reached when air resistance balances the weight of the object.