1
what are the four types of bridges?
Arch, Truss, Beam, Suspension
what is the definition of tension
tension is a pulling force
What is symmetry?
Equal mass on each side of the centre of gravity and looks the same
What type of bridge is the strongest?
Suspension
what is compression?
compression is a sqeezing force.
What is a load?
the mass something must Carry
what is a arch bridge?
Made from stone/brick and bridge deck supported on arch and a strong shape.
what is centre of gravity
The point where gravity acts on the structure.
what is the most stable structure?
Something short with a low centre of gravity
what is a beam bridge?
Flat, supported at both ends, most common and supported by piers and colloums
how do we measure forces?
Newtons
What is gravity?
Gravity acts on all objects greater the mass of object the greater the pull
what are the two main things to consider when deciding what brige to build?
load, function
One newton of force can hold how much mass?
100 grams