Question

What is the coefficient of static friction given this graph and data table?

The margin of error is 0.01. ( Hint: Start with finding the final experimental gradient and divide it by gravity.)

Chart 1: Data for the smooth surface Coefficient of Static Friction - Smooth Surface 1 Fsmax Trendline for Fsmax Steepest Slope Trendline for Steepest Slope 0.75 Shallowest Trendline for Shallowest 0.5 0.25 0 100 150 200 250 300 350 Chart 2: Data for the rough surface 2 5 i6 Table 1: Data for the smooth surface Measurement Mass Weight Maximum Static Friction (g) W (N) m smax Am AF = Trial #1 Trial #2 Trial #3 Average 1 70 0.6867 0.16 0.18 0.16 0.167 2 105 1.03005 0.28 0.22 0.22 0.240 3 134 1.31454 0.34 0.32 0.30 0.300 4 144 1.41264 0.40 0.40 0.42 0.406 5 350 3.4335 0.82 0.82 0.88 0.840