2. 2 L 12 72 (72-144 72(-72) 5 184 grains this is good (1 (1 - 12x) Important: integral done w Make sue you understan 9. (5) A dam has a special design where the lower half is built of concrete, and the upper w half is built of steel (see diagram on board), where all measurements are in meters. Recall a cubic meter has mass 1000 kg, and assume gravitational acceleration is 9.8 m/s2. If the water reaches the top of the dam, find the force applied to the concrete part of the dam. 1000 x 9.8 (13-1)x30x (15+y) w(a) = ab abth 7