Fill in the Blanks Structures, force and stressesOnline version Select the correct words to fill in the blanks. by Yolanda Sánchez 1 TRUSS buildings FRAME MASS Eiffel bridges SUSPENDED pyramids MOST IMPORTANT TYPES OF STRUCTURES : - STRUCTURES : Solid , heavy and very sturdy . Examples : walls , , dams , stone bridges , Greek temples . - STRUCTURES : Composed of columns and beams that act as supporting elements . Examples : reinforced concrete - STRUCTURES : Composed of bars that form triangles . They are lightweight and sturdy . Examples : Cranes , electricity pylons , cell towers , Tower , metal bridges , roofs of factories or sports centres . - STRUCTURES : They are held in place by cables and suspenders , attached to sturdy supports . Examples : suspension . 2 breaking deform demand FORCE , STRESS AND STRENGTH : - FORCE : Influence that can a body , or change its movement , or produce motion in a body at rest . - STRESS : Physical that a body must withstand when one or more external forces are applied to it . - STRENGTH OF A MATERIAL : Ability to withstand external forces without . 3 bend stretch twist cut compress TYPES OF STRESSES : - COMPRESSION : When forces tend to flatten or a body ( try to reduce its length ) . - TRACTION : When forces tend to a body ( try to increase its length ) . - BENDING : When forces tend to a body . - TORSION : When forces try to a body - SHEAR : When forces try to the material . 4 move unstable rigid elastic plastic CONDITIONS FOR STRONG STRUCTURES : - RIGIDITY : A material does not deform . An material deforms and returns to its original shape . A material deforms and stays deformed . - EQUILIBRIUM : A body is in equilibrium when its structure remains stationary . There are two types : stable and . - STABILITY : A body is in stable equilibrium if it does not when a force is applied to it .
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