33106 Chapter 2: Chapter 2
Document Summary
Particle: a point that represents an entire object. Average velocity: a vector quantity whose x-component is the change in x divided by the time interval. The x-component of average velocity is the x-component of displacement, x, divided by the time interval t during which the displacement occurs. vav x = x2 x1 t1 t1. Instantaneous velocity is the derivative of x with respect to t vx = lim. Speed is distance traveled over the time interval. Velocity is displacement traveled over the time interval. On a graph of position as a function of time for straight-line motion (x-t) graph, the instantaneous x-velocity at any point is equal to the slope of the tangent to the curve at that point. Motion diagram: graph that shows the particle"s position at various instants. Average acceleration: vector quantity whose x-component is the change in the x-component of velocity divided by the time interval. aav x = v2x v1x t2 t1.
