Andy sets up an experiment with the goal of determining the coefficient of static friction between a wooden block and a wooden surface. he uses a spring scale to weigh a wooden block. he then places the block on a plane and inclines it until the block begins to slide. the angle of slip is recorded. andy repeats the experiment using a variety of materials to cover the board. he recorded the data in a table. andy did not distinguish between types of sandpaper. how would running two trials, one with fine sandpaper and another using coarse sandpaper, impact his results?