Originally posted by geepamoogle
Horizontal motion does not oppose or counter downward forces, but the good news is that it does not add to it either.
My answer to your question is therefore that your premise of roll it fast enough is flawed.
There is, however, perhaps a small caveat to this. The collapse of the bridge takes time. It may also be the case that only the section ...[text shortened]... damage from the short time it experienced the overburden.
This is my analysis of the problem.
You are starting to catch on.
The entire bridge will not collapse at the same moment. Only the section of the bridge that the ball is/was on will collapse. By the time the section of the bridge collapses, if the ball is moving fast enough the ball may already be on to the next section of the bridge.
In other words, is it possible for the ball to travel along the bridge and have the bridge collapse bit by bit as the ball moves? Or will the ball just immediately crash through the first section of the bridge regardless of the speed at which it is travelling?