Structure in equilibrium
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The document discusses the concept of equilibrium in structures using a seesaw as an example. It explains that a structure is in equilibrium when upward and downward forces are balanced. It then shows a diagram of a seesaw with equal weights on both sides, demonstrating equilibrium as the seesaw stays level. It further explains that adding more weight to one side causes the seesaw to tip in that direction, and equilibrium can be restored by adding equal extra weight to the opposite side to balance the moments.
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Structure in equilibrium
- 1. Structure in Equilibrium • When the upward and downward forces are balanced, the structure is in equilibrium. Structures need to be in Equilibrium so that it will not collapse
- 2. Structure in Equilibrium The diagram below clearly shows a state of Equilibrium. The cars on either side of the seesaw are exactly the same in weight and height, in fact they are the same model. As a result, the seesaw stays level.
- 3. Structure in Equilibrium • If an extra car is added to the right hand side,than the seesaw will turn in a clockwise direction - called a clockwise moment. • Alternatively, if more cars are added to the left hand side, the seesaw will turn in an anticlockwise direction - called an anticlockwise moment.
- 4. Structure in Equilibrium • If the seesaw is to be in equilibrium, the clockwise moments must be equal to the anticlockwise moments. • The seesaw is back in ‘equilibrium’ because a second car has been added to the left hand side, as well.