4.6.1.3 A force does work on an Give the standard 1 When work is done on an Energy circus, eg kettle, object when the force causes Physics definition of object how are the energy microwave, hairdryer, a displacement of the object. work. stores changed? etc students list the – energy transfers. work done = force × distance Equate joules with For various situations where newton-metres. work is done on an object (moved along the line of analyse where the work done action of the force) Describe and calculate has gone, eg an increase in the changes in energy [W = F s ] GPE or an increase in thermal involved when a system energy stores. work done, W, in joules, J is changed by the work done by forces acting WS 1.2, MS 3b, 3c F, in newtons, N upon it. Recall and apply this equation. distance, s, in metres Recall and apply the MS 1c, 3c One joule of work is done equation: when a force of one newton Translate between work done = force × causes a displacement of and joules. distance one metre. [W = F s ] 1 joule = 1 newton-metre 4.6.1.4 Weight is the force acting on Describe and explain 2 Questions for students to Find the weight of an object due to gravity. The what weight is and why consider (think-pair-share). objects within the force of gravity close to the objects on Earth have laboratory Newton Why are astronauts said to Video clip: Earth is due to the weight. meters and then their be weightless even though gravitational field around the mass using laboratory the units used to they are pulled down by Earth. balances or (for heavier measure weight. gravity objects) bathroom The weight of an object How do we measure scales. depends on the gravitational weight?
4.6.1.3 A force does work on an object when the force causes a displacement of the object. work done = force × distance (moved along the line of action of the force) [W = F s ] work done, W, in joules, J F, in newtons, N distance, s, in metres One joule of work is done when a force of one newton causes a displacement of one metre. 1 joule = 1 newton-metre Give the standard Physics definition of work. Equate joules with newton-metres. Describe and calculate the changes in energy involved when a system is changed by the work done by forces acting upon it. Recall and apply the equation: work done = force × distance [W = F s ] 1 When work is done on an object how are the energy stores changed? For various situations where work is done on an object analyse where the work done has gone, eg an increase in GPE or an increase in thermal energy stores. WS 1.2, MS 3b, 3c Recall and apply this equation. MS 1c, 3c Translate between and joules. Energy circus, eg kettle, microwave, hairdryer, etc – students list the energy transfers. 4.6.1.4 Weight is the force acting on an object due to gravity. The force of gravity close to the Earth is due to the gravitational field around the Earth. The weight of an object depends on the gravitational Describe and explain what weight is and why objects on Earth have weight. the units used to measure weight. 2 Questions for students to consider (think-pair-share). Why are astronauts said to be weightless even though they are pulled down by gravity How do we measure weight? Find the weight of objects within the laboratory Newton meters and then their mass using laboratory balances or (for heavier objects) bathroom scales. Video clip:
AQA-8465-SOW-ISLD.DOCX