all objects excert a force of gravity on all other objects. how does this apply to building a bridge?

Question

how would u take gravity and all objects exerting it into consideration when building a bridge?

Answer 1

You don't. Gravity is such an incredibly weak force that it is essentially ignored in engineering. What counts is the electromagnetic force, which is what makes objects solid and prevents them from falling through each other. Engineers use material strength plus stress and strain calculations to determine how to construct a bridge (or anything else) so that it doesn't collapse under its own weight (static strength) or collapse due to external forces like earthquakes, wind, etc. (dynamic strength).

Answer 2

well, other then a bridge, you should know that the weight of an object is essentially the force of gravity on its mass. THeres no difference. So you're really asking how much weight can the bridge hold besides its own.

Then theres the part that the bridges own weigth and that of cars on it are putting their force (their weight) more on some parts of the bridge then others, so you have to even it out by putting in tresses, arcs, cables, etc. These things will eventually transfer the weight to the ground the bridge is supported by ( the foundation)

Answer 3

most objects don't have enough mass to be worth considering in bridge construction. the only one considered insofar as gravity goes is the gravitational force of the earth acting on the materiel needed to build the bridge as well as the payload that the bridge is going to carry. in other words, most engineers don't really account for the tidal force of the moon acting upwards on the bridge...