PHYS 2001 Lecture Notes - Projectile Motion, Centripetal Force, Circular Motion
22 Mar 2014
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If it makes sense to put a direction, it"s a vector: when doing math, must include directions (use trig!, vector + or - vector=vector, a+ or -b=r, scalar x vector = vector. 1 (vector) = vector in opposite direction: can add any # of vectors by placing tail-to-head, easiest if parallel/antiparallel, semi-easy if perpendicular. If not any of the above, break into x and y components: 2 vectors are equal if same magnitude and direction, adding vectors by components, break all vectors being added into components, add all x components. Instantaneous-at a given instant: smallest possible t. 9/5/13: constant acceleration, constant net force constant acceleration, change in x = v(change in t, change in v=a(change in t) d. 9/10/2013: implied conditions, max height-figure out implications for velocity, use just after and just before to avoid complications, up, down, east, west, etc. In free fall, gravity is only force y acceleration is 9. 8 m/s^2 down b.
