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15 Cathedo 20 m ( Umw b) 3.0 160 16) A wheel accelerates with cong seleri of the velocity is 12.0 rudis, what is the ani velocity-490 a) 16 rad b) 20 ads c) 1 s 4) 2 17) An ice skater performs a pirouette a fast spin) by pulling in the his body. What happens to his moment of insin. I wout the exis of route a) It increases c) It does not change b) It decreases d) It changes, but it is impossible to tell 18) A uniform board of weight 50 N supports two children weighing, 4001 respectively. If the support is at the center of the board and the 400- the center, how far should the 300-N child sit from the center in orde 2 1.2 m 300N 400 N c) 1.8 m b) 1.4 m a) 1.6 m