Teaching Physics with the Physics Suite

Edward F. Redish

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Tapping a Rolling Ball

In the figure at the right is shown a strobe photograph of a ball rolling on a horizontal table. The image marked with a heavy arrow occurs at time t = 0 and the ball moves to the right at that instant. Each image of the ball occurs 1/30 s later than the one immediately to its left. On the graphs below, using the coordinate system shown in the figure, sketch qualitatively accurate (i.e., we don't care about the values but we do about the shape) graphs of each of the indicated variables. The time at which the "kink" in the path occurs is t = t1.

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Page last modified September 30, 2002: D02