When might friction be useful?
When might you want to reduce friction?
This week we have learned all about friction. Can you explain what friction is? What effects how much friction there is?
When might friction be useful? When might you want to reduce friction?
4 Comments
finnB
2/4/2015 10:57:11 am
Friction is caused by two surfaces that make contact with each other and rub together, that can cause heat. Friction can also give good grip.There are times where you need friction and there are times when you don't, like when you drive a car you need friction to stay on the road and tyres make that happen. But there is one exception, the worlds fastest car, Bloodhound, does not have tyres because friction slows it down.There are also times where you don't need friction. like on a ski slope where the skiers wax their skies to cause less friction .
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Mrs Keens
2/4/2015 12:09:58 pm
A very good explanation Finn. You have obviously listened carefully this week and learned some interesting information from the clips and discussions.
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Patrick c
2/26/2015 12:06:07 pm
Friction is the force when two objects push together and the more friction there is the less objects will slide. On ice there is barely any friction so it is very slippy. When you rub two things together it also causes heat. If there was no friction you would be able to make any sound because friction causes it. Car tires also have lots of friction so the cars will not fly off the road. We tested friction by getting a rubber and protracter and seeing what angle the rubber slid down the surface.
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Mrs Keens
2/26/2015 01:35:16 pm
Well answered Patrick. You clearly have a good understanding of friction and its effects.
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