A standing wave is formed on a string which is fixed at both ends. The length of the string is L and the amplitude of the antinode is A. What is the average speed of a node point during one complete oscillation?
Question
A standing wave is formed on a string which is fixed at both ends. The length of the string is L and the amplitude of the antinode is A. What is the average speed of a node point during one complete oscillation?
Solution
The speed of a node point in a standing wave is always zero. This is because a node is a point on a wave that always remains at rest. In a standing wave, the nodes are the points where the wave doesn't move - these are the points that are fixed, or 'standing'. So, no matter what the length of the string (L) or the amplitude of the antinode (A), the average speed of a node point during one complete oscillation is always zero.
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