because the bridge will fall any time and some times theres to much wait
Always gravity. Not only bridges, but anything that falls down if no other force is in place.
they fall down if the materials are not strong enough or is the location is not safe
cause they might fall of
Gravity and wind resistance.
The Chinese were the cause of the fall of the mongols
it can hold up the road so the road does not fall down.
So that they don't fall down unexpectedly, especially if they have people on them.
I TOLD YOU i could edit this olvia!!!! :::: Answer: Bridges fall down because of wind sometimes, other times it is because of it's age, and other times it's because of the way they were built compared to the way they should have been built. - Kaitie
so the bridge cant fall down when the cars are on it. And the triagles can keep i
For a start, it's unavoidable that gravity acts on the bridge. Next, if the bridge is not to fall through to the center of the Earth, Earth must push up on the bridge. There may also be forces caused by wind.
Well, if there is not enough support, the bridge could wear down, therefore unsafe. It could fall down instantly or when people drive on it.
They Fall Down And Drop
The force of gravity, weight = mg.
in my mind others are down cause is that,