= Students consider elastic this can be applied for a varying area under force–extension MS 2.2 Change the subject of an strain energy and how this is force graph equation represented in Derive the equation for the Quantitative and qualitative MS 2.4 Solve algebraic equations graphs. energy stored in a spring application of energy MS 3.8 Understand the physical conservation to examples Apply this equation to the significance of the area between a involving elastic strain energy and solution of problems involving curve and the x-axis and calculate energy to deform the conservation of energy it or estimate it by graphical Spring energy transformed into methods kinetic and gravitational potential energy 5 Analysing stress–strain Design and carry out simple 3.4.2.1 Interpretation of simple MS 3.1 Translate information 12.1, 12.3 graphs experiments to produce stress–strain curves between graphical, numerical and graphs for various algebraic forms Students carry out Description of plastic behaviour, materials measurements to produce fracture and brittle behaviour stress–strain graphs, analyse Analyse the results graphically liked to force–extension graphs stress–strain graphs and Describe the behaviour of each 3.4.2.2 define the Young modulus. material and explain it in terms Use of stress–strain graphs to find of molecular structure the Young modulus Identify sources of error and quantify uncertainties in measurements 6 Measuring the Young Demonstrate mastery of the 3.4.2.2 MS 1.2 Find arithmetic means 12.3 Required modulus following practical competencies: Practical 4: Use of stress–strain graphs to find MS 3.1, 3.2, 3.3, 3.4, PS 3.1 Plot Determination Students carry out a Follows written procedures the Young modulus and interpret linear graphs of the Young Required Practical to modulus by a Applies investigative PS 3.2 Process and analyse data measure the Young modulus simple method approaches and methods when using appropriate mathematical of a material. using instruments and skills equipment PS 4.1 Know and understand how Safely uses a range of practical to use a wide range of equipment and materials experimental and practical instruments, equipment and Makes and records techniques observations
Students consider elastic strain energy and how this is represented in graphs. this can be applied for a varying force Derive the equation for the energy stored in a spring Apply this equation to the solution of problems involving the conservation of energy = area under force–extension graph Quantitative and qualitative application of energy conservation to examples involving elastic strain energy and energy to deform Spring energy transformed into kinetic and gravitational potential energy MS 2.2 Change the subject of an equation MS 2.4 Solve algebraic equations MS 3.8 Understand the physical significance of the area between a curve and the x-axis and calculate it or estimate it by graphical methods 5 Analysing stress–strain graphs Students carry out measurements to produce stress–strain graphs, analyse stress–strain graphs and define the Young modulus. Design and carry out simple experiments to produce graphs for various materials Analyse the results graphically Describe the behaviour of each material and explain it in terms of molecular structure Identify sources of error and quantify uncertainties in measurements 3.4.2.1 Interpretation of simple stress–strain curves Description of plastic behaviour, fracture and brittle behaviour liked to force–extension graphs 3.4.2.2 Use of stress–strain graphs to find the Young modulus MS 3.1 Translate information between graphical, numerical and algebraic forms 12.1, 12.3 6 Measuring the Young modulus Students carry out a Required Practical to measure the Young modulus of a material. Demonstrate mastery of the following practical competencies: Follows written procedures Applies investigative approaches and methods when using instruments and equipment Safely uses a range of practical equipment and materials Makes and records observations 3.4.2.2 Use of stress–strain graphs to find the Young modulus MS 1.2 Find arithmetic means MS 3.1, 3.2, 3.3, 3.4, PS 3.1 Plot and interpret linear graphs PS 3.2 Process and analyse data using appropriate mathematical skills PS 4.1 Know and understand how to use a wide range of experimental and practical instruments, equipment and techniques 12.3 Required Practical 4: Determination of the Young modulus by a simple method