Teaching Physics with the Physics Suite

Edward F. Redish

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Moving with the Pulse

In the figure below is shown a snapshot of a piece of an elastic spring on which a pulse is traveling.   Each square of the grid represents 1 cm.   In a video of the motion of the pulse, the pulse is observed to move a distance of 2 cm in 0.04 seconds.

Three pieces of tape are attached to the spring.   They are marked by small circles in the figure and are labeled A , B , and C .

On the graphs below, graph the velocity of each of the 3 pieces of tape as the pulse moves past them.   Draw the graphs carefully and indicated the scales you are using for your axes.


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Page last modified February 2, 2006