Question

The central span between the towers on a bridge is about 160 feet, or about 50 meters. As a physics experiment most of us in the group went to the exact center of the span and started jumping up and down at a rate that matched the natural rhythm of the bridge. We created a transverse standing wave with nodes at the support towers and the antinode in the center, where we were standing. We counted 24 full vertical oscillations in 15 seconds with an overall vertical motion of about six inches.

Answer 1

2) What was the vertical amplitude, A, of the bridge, in inches?