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 Teacher Assignments Teacher Entries Work 6/15 5/16 The Force of Friction 5/15 Testing Time 5/4 Week 7 Blog 5/1 Elastic Force & Gravity 4/25 Dream Job 4/19 Energy 4/17 Charging a Battery 3/22 Building a Battery 3/19 Show All Battery KWL 3/13 About My Place 3/12 Chimacum Creek Conclusion 2/28 Student Entries

 Article posted June 15, 2012 at 03:19 PM GMT • comment • Reads 265 Work is when a force causes something to move. Reading a book is not scientificly work. Pushing a brick over the table is work. When my team measured the friction of the blocks, the work was 0.189 Newton-meters. The motor used 0.2 newton-meters. Article posted June 15, 2012 at 03:19 PM GMT • comment • Reads 265
 Article posted May 16, 2012 at 03:30 PM GMT • comment • Reads 38 Thanks to lexlucis_msls at photo bucket How much I love science. :) Article posted May 16, 2012 at 03:30 PM GMT • comment • Reads 38
 Article posted May 15, 2012 at 03:34 PM GMT • comment • Reads 70 In inquiry 6.1 I learned that different surface types require different forces of friction. For example it takes less friction force to pull a block on waxpaper than on sandpaper. In inquiry 6.2 I learned that the more weight an object has the more friction force it takes to pull it. For example 1 block of wood will be easier to pull than 2 blocks of wood, In inquiry 6.3 I learned that different surface areas will take different force of friction. For example a short narrow side is harder to pull than a wide long side. We measured sliding friction by pulling a block with a spring scale. We used the spring scale to calculate how much friction force it took. I learned that when constructing an experiment you must only have one manipulated variable and one measured variable. All the other variables are controlled. Otherwise the results of your experiment may vary. For example in our experiment of different surface areas the conrolled variables were the pull distance, the speed, slope, and suface type. Article posted May 15, 2012 at 03:34 PM GMT • comment • Reads 70