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AQA GCSE Combined Science: Synergy · 8465
Explain, using practical examples, that changing an object's shape by stretching, bending, or compressing absolutely requires the application of more than one force.
Describe the fundamental difference between elastic distortions and inelastic distortions caused by stretching forces.
Describe the specific linear and non-linear mathematical relationships between the applied force and the resulting extension for a spring and other simple systems.
Calculate the precise spring constant when dealing with linear force-extension cases.
Explain that the extension of an elastic object is directly proportional to the applied force, provided that the precise limit of proportionality has not been exceeded.
Recall and correctly apply the equation:
Identify the correct units for force in newtons, spring constant in newtons per metre, and extension in metres.
Understand that a force stretching or compressing a spring performs work, resulting in elastic potential energy being stored within the spring.
State that, within the limit of proportionality, the work done on the spring is exactly equal to the elastic potential energy stored.
Conduct a practical investigation to rigorously determine the relationship between applied force and extension for a spring.