Physics 197 Lecture Notes - Lecture 3: Operational Definition, Row And Column Vectors, Classical Mechanics
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Physics 197 Full Course Notes
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Particle: a hypothetical object that has mass but zero volume, and thus its position is a mathematical point in space: delta of vector r = vector r2 - vector r1. [delta y] = [y2] - [y1] = [y2 - y1] [delta z] [z2] [z1] [z2 -z1: since at every instant of time a particle occupies a mathematical point in space, we can describe its motion as a sequence of displacements at various instances of time. The displacement vector d(vector r) multiplied by the scalar 1/dt. [vz] [dz] [dz/dt: limitations: the interval dt must be short enough that the velocity remains constant during dt, notes: the direction of velocity is the direction of motion; mag(velocity) = speed v. Symbols: m is the particle"s mass, vector v is its velocity. Limitations: this equation applies to particles only, and only in the context of newtonian mechanics. Notes: the si units for vector p (momentum) are kilogram-meters per second.
