Teaching Physics with the Physics Suite
The picture below shows a snapshot of a piece of a wave at a time t = 0. Make four copies of this picture and sketch what each pulse would look like at a slightly later time (a time small compared to the time it would take the pulse to move a distance equal to its own width but large enough to see a change in the shape of the string) for the following four cases:
1) The pulse is a traveling wave moving to the right.
2) The pulse is a traveling wave moving to the left.
3) The pulse is a standing wave whose amplitude is growing.
4) The pulse is a standing wave whose amplitude is shrinking.
On each picture draw arrows to show the velocity of the marked points at time t = 0.
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Page last modified October 30, 2002: O20