This involves determining the proportionality of force relative to a given distance from a prescribed point. A bridge must be able to withstand a certain amount of load given its intended use. A practical demonstration could incorporate the use of two scales or spring balances. A given beam is used to bridge the two balances to which is attached a sliding weight. As the weight changes positions on the beam, the result of the balances are checked to record the change in force relative to the distances moved.
2. The students will be required to construct a bridge using available materials
3. They will be expected to construct proportional models of the intended load
4. They will be expected to compare different designs and identify their advantages and disadvantages
Students will be expected to acquire information on famous bridges and the general history of their construction. Discussion will also focus on the materials used in the construction, the environmental impact of the structure and quite importantly the social and economic effect on the population within the area of the structure.
