By adjusting the length of the bridge will be three sizes 15 25 and 35 meters long section of the bridge to the natural frequency of the bridge and replace with .
The bridge length is 3 meters in size, is 15 to 25 and 35, where the length is changed to make the section of the bridge and the natural frequency of bridge change. .
The Bridge will be adjust the length is 3, 15, 25, and 35 meters long, the change to section of the bridge and the frequency of Natural Bridge to replace a .