AEM 2021 Lecture Notes - Lecture 1: International System Of Units
17 May 2017
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Document Summary
Dynamics- the study of bodies in motion (corollary of statics) Kinematics- descriptive part of dynamics, uses geometry to describe motion in terms of position, velocity, acceleration. Kinetics- predictive part of dynamics, brings in newton"s second law (nsl), to solve for acceleration, assuming given forces. Rectilinear motion (of a particle) is motion along a given line. Choose origin and positive direction (+ is to the right of o, - is p to the left). X changes with time rate of change of x is velocity. Convention is for + and - to the left. Si units are m/s and peasant units are ft/s or in/s. The magnitude of v is speed (always positive), but v can also change c. Si units are m/s , peasant units are ft/s or in/s . Holy grail of dynamics x(t) (find x for any t) can be done once we know. Recover x(t) from knowledge of a (nsl) by integrating twice.
