The wooden block was placed sideways with its short face touching the track. As before, the maximum static friction force and the kinetic friction force at constant velocity was determined. Results are reported on Table 3.

Table 3

E) Report on Table 3 also the uncertainty on each column for Total mass, Normal force, Static Friction, and Kinetic Friction.

F) To confirm the hypothesis that the area of contact is not related to the coefficient of friction, compare the forces of friction in the two conditions reported on table 3. Determine the quantity difference below

G) Accept or reject the hypothesis? If this ratio is smaller than 3, then your hypothesis is acceptable because it is within the margin of error.

Table 1. RESULTS Felt on Al Total mass Normal Static Force friction Force (N) (N) 5.8898 1.333 8.3202 1.807 10.7898 2.369 13.2594 | 2.961 (kg) 0.601 0.849 1.101 1.353 Kinetic friction Force (N) 1.104 1.46 1.93 2.332 Trial 1 Block +2 masses Trial 2 Block +3 masses Trial 3 Block +4 masses Trial 4 Block +5 masses Results for the coefficients of friction from the plots us= .2216 Mk.1794 Table 2. RESULTS Wood on Al Total mass Normal Force Trial 1 Block +2mass Trial 2 Block +3 masses Trial 3 Block +4 masses Trial 4 Block +5 masses (kg) 0.600 1.097 1.595 1.845 (N) 5.88 10.7506 15.631 18.081 Static friction Force (N) 1.546 2.243 3.183 3.881 Kinetic friction Force (N) 1.384 2.075 2.835 3.318 Results for the coefficients of friction from the plots us= .1775 U=.1440 Total mass (kg) 0.6 0.6 Static friction (N) 1.546 1.632 Kinetic Friction (N) 1.384 1.298 Block sideway with 2 extra masses FROM TABLE 1 Rewrite the results for Trial 1 Block +2masses Table 1. RESULTS Felt on Al Total mass Normal Static Force friction Force (N) (N) 5.8898 1.333 8.3202 1.807 10.7898 2.369 13.2594 | 2.961 (kg) 0.601 0.849 1.101 1.353 Kinetic friction Force (N) 1.104 1.46 1.93 2.332 Trial 1 Block +2 masses Trial 2 Block +3 masses Trial 3 Block +4 masses Trial 4 Block +5 masses Results for the coefficients of friction from the plots us= .2216 Mk.1794 Table 2. RESULTS Wood on Al Total mass Normal Force Trial 1 Block +2mass Trial 2 Block +3 masses Trial 3 Block +4 masses Trial 4 Block +5 masses (kg) 0.600 1.097 1.595 1.845 (N) 5.88 10.7506 15.631 18.081 Static friction Force (N) 1.546 2.243 3.183 3.881 Kinetic friction Force (N) 1.384 2.075 2.835 3.318 Results for the coefficients of friction from the plots us= .1775 U=.1440 Total mass (kg) 0.6 0.6 Static friction (N) 1.546 1.632 Kinetic Friction (N) 1.384 1.298 Block sideway with 2 extra masses FROM TABLE 1 Rewrite the results for Trial 1 Block +2masses