(Physics) Why do marching soldiers break step when walking across a bridge?

[sahrish khan]

@Ajwah Nice sharing sis

 

[Ajwah]

@sahrish khan pasnd krne ka shkrya

 

[sahrish khan]

@Ajwah its my pleasure sis

 

[Blue Moon]

Beautiful sharing

 

[Noor-e-Kainat]

@Ajwah the best post always
Thanks For sharing sisi