PHYA11H3 Lecture Notes - Lecture 3: Coordinate System, One Direction
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2. 2 uniform motion: uniform motion: straight line motion in which equal displacements occur during any sequential equal-time intervals, non-uniform motion is over same time interval and get different displacements. Two skaters: graph shows two skaters moving apart, decide what your independent and dependent variable is. In this case time is the independent variable: negative slope means negative velocity, makes sense because velocities are in opposite direction. That is, the slope is not simply x / t * Mathematics of uniform motion: sf = si + vsdt (uniform motion) Graph of position vs time for bob and susan: at some point in time, bob and susan will meet, set the problem up with diagram and define variables, 0 is initial time. Which position-vs-time graph represents the motion shown in the motion diagram: direction of motion is right to left, so slope is going to be negative, does(cid:374)"t start fro(cid:373) the origi(cid:374) so there"s o(cid:374)ly o(cid:374)e possi(cid:271)le a(cid:374)s(cid:449)er.
