Thought experiment: we claim that the air track is frictionless, but this is not entirely true. how would our newton's 2nd law models (eq. 1 and eq. 3) of the two systems studied in this lab change if we were to account for the force of friction acting on the glider as it travels across the track? draw force diagrams to you. use f to denote the mathematical term for the force of friction. ww hence a fixed force (f = mhg). mass will be added to the glider, so that: f=mng = (m + mn)a (eq. 1) resulting in: fmg sin 0= ma (eq. 3)

You are a researcher for a golf club manufacturer. you are given two identical looking cubes of a metal alloy. you are informed that they are made of the exact same material, but one is crystalline, whereas the other is amorphous. it is your job to determine which one is amorphous this one is more stress-resistant and is useful in reinforcing golf clubs. which of the following is the best way to determine which is which? a. determine the density of each cube. the more dense one is the amorphous solid. b. melt both cubes and look for a broader range of melting temperatures. the one that melts over a broader range of temperatures is the amorphous solid. c. determine the density of each cube. the less dense cube is the amorphous solid. d. melt both cubes and measure the range of melting temperatures. the one that melts over a narrower range of temperatures is the amorphous solid.