the force was torsion. the wind made it bend like silly puddy ************** The force exerted TO the Tacoma narrows bridge was initially the wind resistance. The wind resistance caused the whole bridge to act as a system with forced vibration with damping.
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To spread the force being exerted on them from the weight they hold up over as wide an area as possible to help prevent damage
A class three lever uses an operating force between the fulcrum and the load. The movement on the load will therefore be larger than the movement of the force. The force applied to the lever will always be less than the force exerted on the load.
Tension is a force on a bridge that pulls, or acts to expand the thing it is acting on.
More force is exerted with one pulley.
machines make work easier by cahnging the amount of force exerted, and changing the distance and derection of the force