4.The smoother surfaces resulted in less friction, significantly more force was required for the block with sandpaper than the block with glass.5.The block with glass seemed to be the most repeatable test, the impulses required to overcome the friction were almost equal to that of sustaining motion.6.There is always a need for more force to begin motion than to maintain that motion.7.Smaller coefficients would mean less energy lost to friction, meaning more energy can be applied to the work.8.More friction would increase the grip of the tires to the road, improving traction.During this experiment there weren’t really any difficulties. The only thing that was even remotely difficult was reading the scale as force increased and decreased. This experiment busted the myth that more surface area creates more friction, but instead showed that the type of surface itself affects friction. It also showed that the impulse required to overcome the inertiaof an object is more than that to continue against that friction. The experiment deepened the understanding of the laws of physics, including force, mass, and the effect of gravity. Attached are the force results for each step of the experiment.