Forces
Loads
Bridges
Bridge Supports
Simple Machines
100
This force can be described as one that "pushes" or "squeezes" an object.
What is compression?
100
This load is the weight of an object by itself with only the force of gravity and the weight of the materials its made from acting on it.
What is a dead load?
100
This is the most common and simple kind of bridge.
What is a beam bridge?
100
This support is used as horizontal bracing for a bridge and are made into the shape of a triangle.
What is a truss?
100
This kind of pulley offers no mechanical advantage to lift a load.
What is a single fixed pulley?
200
This force can be described as one that "pulls" or "stretches" an object.
What is tension?
200
This load is when the weight of an object or objects is added to a structure.
What is a live load?
200
This bridge is a very popular choice and is made strong by a series of triangles or "trusses."
What is a truss bridge.
200
This support is a long piece of wood, concrete, or steel that supports the roadway of a bridge.
What is a beam?
200
A lever is a rigid bar that rests on this point.
What is a fulcrum?
300
This force can be described as one that "twists" or "rotates" an object.
What is torsion?
300
This load affects a structure when it shakes it back and forth violently as the ground moves.
What is an earthquake load?
300
This is the second oldest kind of bridge and it is supported by a giant arch.
What is an arch bridge?
300
This support comes in the shape of bars that give support or strength to a structure through compression.
What is a strut?
300
Seesaws and scissors are an example of this kind of lever.
What is a first class lever?
400
This force can be described as one that squeezes one side of an object and stretches the other side.
What is bending?
400
This load is when wind blows on an object.
What is a wind load?
400
This kind of bridge can span long distances and is a version of the beam bridge that has towers supported by cables.
What is a suspension bridge?
400
This support is a set of flexible steel ropes that support the roadway of a supsension bridge.
What are cables?
400
This kind of lever has the fulcrum at one end and the load is between the fulcrum and the effort force.
What is a second class lever.
500
This force can be described as a "sliding" force where one side goes past the other.
What is shear?
500
This load is created when an object moves on a structure creating vibrations.
What is a dynamic load?
500
This bridge is a modified version of the beam bridge with the support coming in the middle of the bridge not at the end.
What is a cantilever bridge?
500
This support is a horizontal iron or steel beam that supports a load and has an I shape.
What is a girder?
500
This kind of gear has its teeth cut on a cone.
What is a bevel gear?
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