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# Tafkam

Name Forces tafkam 7 Science Physics Year 7 unit on Forces 85_Forces.doc

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Unit H Forces

 Key Expectations forunit:MostChildren: will be ableto explain the difference between weight and mass. They will use aNewtonmeter with accuracy to measure and record a variety offorces. They will recognise that balanced forces lead to themaintenance of constant speed and direction, and that unbalancedforces will alter one or more of these aspects. They recogniseexamples of when friction can be useful, and can identify ways inwhich problematic friction can be reduced. They will usemeasurements of distance and time to calculate speed.More able:will recognise balancedforces in a range of contexts, and describe how balanced andunbalanced forces affect the objects on which they act. They useterms such as upthrust and density, explaining their meaningsclearly. They describe ways in which friction can be useful, givingmore subtle examples, for example noting that the use of wheels tomove an object requires the friction which they weredesigned to overcome.Less able:will familiar with the termsweight and mass and will begin to differentiate between them.They will be able to use a Newtonmeter to record forces in avariety of contexts. They recognise friction as a force, and beginto understand that it can be useful as well as problematic. Theywill be able to describe circumstances where forces are balanced,and how this affects the behaviour of objects. They will understandspeed as relationship between distance and time. Time(hours) Content Learning ObjectivesChildren tolearn: Week 7 Lesson H180 minutes Weight vs Mass(forcemeter) To be ableto distinguish between mass and weight To know thatweight is a measure of downward force caused bygravity To be ableto use a Newtonmeter to measure weight Week 7 Lesson H280 minutes Floating & Sinking To identify the forces acting onan object which floats or sinks  To recognise and use the termsupthrust and density  To be able to use arrows toindicate the direction and magnitude of a force Week 8 Lesson H380 minutes Balanced/unbalanced forces To be able to describe situationswhere forces are balanced  To recognise that balanced forcesmaintain the status quo  To use arrows to indicate thedirection and magnitude of a force Week 8 Lesson H480 minutes Friction To recognise that friction can beuseful  To describe ways in which frictioncan be reduced  To be familiar with drag as afriction force Week 9 Lesson H580 minutes Calculating speed To know how to calculatespeed  To design an investigation thatinvolves measuring speed Week 9 Lesson H680 minutes Mini-investigationSailing Boats To carry out aninvestigation  To record data relating to speed,carrying out calculations as appropriate.  To present findings of aninvestigation