Abstract
An introductory laboratory experiment about measurement and its reliability has been developed for general science students. The experiment keeps their interest by focusing on the measurement outside the classroom of a quantity of daily interest (speeds of automobiles). It allows simple estimates of direct measurement errors, allows the experiment to be designed accordingly, and stresses the reliability (court room defense) of the measurement of the quantity of interest. At the same time, the kinematical concepts of average velocity, instantaneous velocity, and acceleration can be introduced as can the utility of significant figures and graphical display.
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