Question

why soldiers are not allowed to march over a bridge​

Answer 1

Answer:

Because

Explanation:

They march with a great energy and the force which comes out from their legs will collide the bridge..so that the bridge may collapse..

Hope it helps :)

Answer 2

Answer: The soldiers are asked to break their steps while walking on a bridge as when they march, they apply force in the same frequency. Forced vibrations take place in the bridge. If the frequency of the soldiers is same as the natural frequency of the bridge the bridge will collapse due to resonance as it will vibrate with a large amplitude