Teaching Physics with the Physics Suite
Edward F. Redish
Consider the motion of a pulse on a long taut string. We will choose our coordinate system so that when the string is at rest, the string lies along the x axis of the coordinate system. We will take the positive direction of the x axis to be to the right on this page and the positive direction of the y axis to be up. Ignore gravity. A pulse is started on the string moving to the right. At a time t0 a photograph of the string would look like figure A below. A point on the string to the right of the pulse is marked by a spot of paint.
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Page last modified October 11, 2002: O03