Quote:
Originally Posted by Fbone
A truck comes to a 1000 ft. long bridge and stops right before going on to it to read a sign. The sign says that the maximum weight the bridge can hold is 4 tons, which is the exact weight of the truck. So the truck starts going on the bridge. About halfway over the bridge a little bird lands on the top of the truck. Does the bridge break?
|
If the sign and the weights are correct, yes it breaks. And the bridge must be a flat bridge.
I did consider that the truck might be going down the other side of the bridge, in which case its weight would be lessened because it is going down. But in that case it would have already broken the bridge by being effectively slightly heavier than 4 tons on the first upwards part of the bridge.
Of course, in the real world bridge weight limits are no the actual limits. Unless someone's done something terribly wrong.