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 Teacher Assignments Teacher Entries Classification of living things 2/28 Passion post 1/22 New 7 random facts 1/20 Is it living 11/8 Living things 11/1 ocean slideshow 10/10 Week 7 5/16 friction force 5/15 How to make A cart move with a rubber band 4/25 chargeing batterys 3/28 Show All this is wheres i live 3/28 Batterys 3/15 Water cycle 1/31 Tree planting 1/27 underwater bugs 11/3 7 random facts 10/3 Student Entries

well we are supposed to say what we learned about friction.

lesson 1: i learned that different surfaces have different amounts of friction. the fine sandpaper has the most friction.

lesson 2: i learned that with more weight comes more friction. like if you pull 2 blocks, it has more friction than with just 1.

lesson 3: i learned that different sides of the block have different amounts of friction, but its not much of a difference.

we measured sliding friction by using spring scales in class. friction can be measured when it pulls back on the object you are pulling. so when you pull it, you can measure the resistance with a spring scale, and that is
friction and that is how you can measure friction with a spring scale.

we learned that controlled variables are important. plus also here are some examples.
1:distance pulled
2:slope
3:surface type
4:speed
5:block type
those are things that are controlled variables, which means they stay the same.

well, yep! thats it! bye!
Article posted May 15, 2012 at 09:17 AM • comment • Reads 231 • Return to Blog List