1. For a 1200 kg car: a) Find the cost of transportation in units of MJkm- for a 1200 kg car if it drives 1 kilometer at an average speed of 15 m/s (54 kph). Assume: n= 23% engine it stops and starts 3 times per km (city driving) it has Crr=0.025 cross section is 2.2m by 3.25m; Ca=0.30; air density 1.29 kgm-33. A teacher uses this SMART board to teach all of her physics classes indmonton. a] Make a model and determine how much full-life energy is saved each year by using this board as opposed to using an overhead projector. raw d\\