4.6.1.5 An object raised ground Calculate the amounts of 1 WS 1.2, MS 3c Set up a of objects level gains gravitational energy associated with at different heights Recall and apply this equation potential energy an object raised above above ground level. Ask to calculate changes in stored ground level. students to work out the g.p. e . = mass × energy. gravitational potential gravitational field strength × In any calculation the value of energy. What will they height the gravitational field strength need to measure? Ep = m g h (g) will be given. gravitational potential energy, in joules, J Ep, mass, m, in kilograms, kg gravitational field strength, g, in newtons per kilogram, N/kg height, h, in metres, m 4.6.1.6 An object that has been Define elastic 2 Why shouldn’t I stretch springs Investigate the effect of stretched has been deformation. too much? loading and unloading elastically deformed if the springs stretched too Sketch and describe the Sketch on an existing graph Practical: object returns to its original and beyond their elastic force and extension the force extension curve for – length after the forces are limits. Add a force of 1N Teachit Science curve of an elastic a spring with a spring constant removed. An object that does (100 g mass) at a time resource material (eg elastic band of greater or lesser value than not return to its original and measure the or spring) when not the spring given. length after the forces have extension of the spring. stretched beyond its Calculate the force acting on a been removed has been Continue until the spring elastic limit. spring when given the spring inelastically deformed. The is clearly stretched
4.6.1.5 An object raised ground level gains gravitational potential energy g.p. e . = mass × gravitational field strength × height Ep = m g h gravitational potential energy, Ep, in joules, J mass, m, in kilograms, kg gravitational field strength, g, in newtons per kilogram, N/kg height, h, in metres, m Calculate the amounts of energy associated with an object raised above ground level. 1 WS 1.2, MS 3c Recall and apply this equation to calculate changes in stored energy. In any calculation the value of the gravitational field strength (g) will be given. Set up a of objects at different heights above ground level. Ask students to work out the gravitational potential energy. What will they need to measure? 4.6.1.6 An object that has been stretched has been elastically deformed if the object returns to its original length after the forces are removed. An object that does not return to its original length after the forces have been removed has been inelastically deformed. The Define elastic deformation. Sketch and describe the force and extension curve of an elastic material (eg elastic band or spring) when not stretched beyond its elastic limit. 2 Why shouldn’t I stretch springs too much? Sketch on an existing graph the force – extension curve for a spring with a spring constant of greater or lesser value than the spring given. Calculate the force acting on a spring when given the spring Investigate the effect of loading and unloading springs stretched too and beyond their elastic limits. Add a force of 1N (100 g mass) at a time and measure the extension of the spring. Continue until the spring is clearly stretched Practical: Teachit Science resource
AQA-8465-SOW-ISLD.DOCX