Friction Lab

In this lab, we were supposed to find the static friction of a block on a slanted board with one side covered in sand paper and then the other side smooth. The block weighed 161.5 g. We placed the block, on its sandpaper side, on the board. We then tilted the board upward from the table until the block started to slide. We found the angle closest to the point of sliding without sliding. The angle for the sandpaper side was 42 degrees. The angle for the smooth side was 17 degrees. we then used sin and cos to find our components (ex: 42cos161.2). We found that the static friction of the sand papered side was 1.06N and the static friction of the smooth side was .463N.