2. [13 Points] DETAILS MY NOTES On a straight road (taken to be in the +x direction) you drive for an hour at 50 km per hour, then quickly speed up to 120 km per hour and drive for an additional two hours. (a) How far do you go (Ax)? total distance : \\:| krn (b) What is your average X component of velocity (vavg'x) Vavgpx = l:l km/hr (c) Why isn't Vavg,x equal to the arithmetic average of your initial and final values of vx, (50+120),"2 = 85 km per hour? 0 The arithmetic mean is not a valid way to calculate the average in this situation. 0 The velocity isn't constant. 0 The initial velocity isn't zero. Additional Materials E eBook