PHYS 1201Q Study Guide - Midterm Guide: Thermodynamics, Ideal Gas Law, Inertial Frame Of Reference
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Week 1: when multiplying out/dividing squared/cubed units, just do the operation as many times as the power indicates. M3 = m m m. Require magnitude (of speed) & direction (+ or -, n, e, s, right, left, etc. ) + and refer to direction, not size, of vectors. R refers to size of a vector: distance, displacement, average/instantaneous speed & average/instantaneous velocity. Distance = how far you traveled, regardless of initial or final position. Displacement = distance from initial point to final point. Speed = distance traveled/time it took to travel it. Velocity = displacement/time (slope of line from initial position to final position) For curved paths, tangent lines give more accurate representations of actual speed at that point on the curve. A positive change in displacement is indicative of positive velocity. Acceleration does not necessarily have to correlate with displacement. If velocity and acceleration have the same sign, object is getting faster and faster.
