KinematicsF2013-Ave+[Compatibility+Mode]

A position versus time graph phys 1l03 fall 2013

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Unformatted text preview: sition-versus-time graph PHYS 1L03, Fall 2013, McMaster University, R. Nejat 6 One-Dimensional Motion One-Dimensional Motion Average speed: Example: distance t2 t1 vavg |speed distance t • Speed is a scalar – Is always positive • Over a finite time interval we define an average speed (vavg) • Unit of v is m/s PHYS 1L03, Fall 2013, McMaster University, R. Nejat PHYS 1L03, Fall 2013, McMaster University, R. Nejat One-Dimensional Motion One-Dimensional Motion Instantaneous Velocity: vinst lim t 0 x t dx dt (omitting vector signs). • Instantaneous velocity at any time is the slope of a line tangent to the position-versus-time graph at that time. Instantaneous Velocity: vinst(t2) = slope of this line (tangent to the carve) • Is represented by the slope of a line tangent to the curve on the position-versustime graph vinst lim t 0 x t dx dt x (m) t (sec) PHYS 1L03, Fall 2013, McMaster University, R. Nejat PHYS 1L03, Fall 2013, McMaster University, R. Nejat 7 One-Dimensional Motion One-Dimensional Motion Example: • Use the position vs. time graph for a tr...
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