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Check equation consistency by matching dimensions on both sides.
Every measurement has uncertainty; how it combines under operations.
Sum of two vectors is the diagonal of the parallelogram they form.
Any vector splits into perpendicular components along chosen axes.
Three equations relate u, v, a, s, t under constant acceleration.
Uniform horizontal + free fall vertical = parabolic trajectory.
Acceleration is proportional to force, inversely to mass.
Total momentum of an isolated system stays constant.
Net work equals change in kinetic energy.
For small deformations, stress is proportional to strain.
Longitudinal elasticity — how much a wire stretches under load.