There is a bridge that crosses a riverWhen it allows boats to pass, it turns sidewaysThe moving parts of the bridge don't raise or lowerFigure out how this is possible.I have to make a model but honestly i don't even get how it is possibleCan anyone help please?!
Picture a crank on a gumball machineThe bridge is ancored squarely in the middle of the river and pivots on its axisHope this helps(Rotate a stick 90 degrees to simulate the movement of the bridge.
