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Roll With The Changes (Friction)
http://teacher.scholastic.com/dirt/roll.htm Roll With The Changes (Friction) Why do the tires on your bike roll better when they're all pumped up than when they're soft? And why do your roller blades go better on smooth pavement than on a sandy road? The answer is friction...the big rub! The force that slows you down and gets you going; without friction, you'd be slip slidin' away! |
 
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Friction : BBC Multimedia Science
http://www.bbc.co.uk/schools/scienceclips/ages/8_9/friction.shtml Friction : BBC Multimedia Science |
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Friction
http://www.digitalbrain.com/digitalbrain/public/subjects/1.%20primary/ks2sci/su4/mod2/exercise3.db_psc Friction Friction is a force that happens when two surfaces rub together. Friction is a force that opposes motion in other words it is a stopping force. Sometimes we want there to be a lot of friction - when we want to stop! But other times we try to reduce friction, when we want to move quickly. In the following exercises you can find out how we depend on friction and how we try to reduce it in everyday life. |
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Friction - 4learning
http://www.channel4.com/science/index.html Friction is a force that slows movement. It can slow your movement down the park slide (solid against solid), or swimming through the water (solid against liquid) or dropping with a parachute (solid against gas). |
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This is the Friction (4e) link area
/pages/learning/ScienceP/Friction/ Bookmark this page for easier return visits. |
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Friction (4e)
http://www.standards.dfes.gov.uk/schemes2/science/sci4e/?view=get In this unit children build on their existing knowledge of forces and learn that forces can be measured and compared. The unit focuses on friction as a force which exists between objects moving across solid surfaces and opposes motion, and the forces of air resistance and water resistance which oppose the motion of objects moving through air and water. Experimental and investigative work focuses on: -deciding what evidence should be collected when planning and carrying out a fair test -making measurements using a forcemeter -looking for patterns in results, interpreting and suggesting explanations for these. Work in this unit also offers opportunities to relate knowledge and understanding of frictional forces to everyday contexts and to recognise that science provides explanations for familiar phenomena related to friction. This unit takes approximately 11 hours. |
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