Page 4 - LetsUsMakeABridge

structures there is. The cable of the bridge is inherently stable against any disturbance if it is thick
enough to withstand any tension. The forces (tension mostly) are carried to the tops of the high towers
(which should and usually are resilient against flexure, buckling, and oscillation) through the cables,
instead of being directed towards the ground - which would happen if the bridge is an arch bridge. But
what sets the suspension bridge apart from most conventional bridges is that all the forces do not
"internally-cancel." Instead, the forces are directed in a way that the tensions are resisted by the ground,
which is in compression!

RESEARCH TASK
Let us understand some basic bridge designs that you can make. Watch the following video:

https://www.youtube.com/watch?v=oVOnRPefcno

I learnt the following:

1. Bridges are of the following types:
______________________________________________________________________________
______________________________________________________________________________

2. ____________________ Shape can be used to make a strong bridge.
3. We know that strong material can be used to make the bridge stronger but does the design of
the bridge also matter in making the bridge stronger?
4. ______________________________________________________________________________
______________________________________________________________________________

Now watch the following video to enhance your understanding:

https://www.youtube.com/watch?v=NE2VchWrtLM

I learnt the following:
1. The shape of the bridge is _____________ (important/ not important) in the making a strong
bridge.
2. Truss is a strong structure that can be used to design a strong bridge. Truss is made of ________
shape. Draw a simplest truss.