Track Team runners are participating at a meet and runner A is traveling at ?_A = 4.5 ?/? in the straight section with his speed increasing at a rate of 0.5 ?/?². Runner B is rounding the bend (center at C, with a center lane radius ? = 45 ?) moving at ?_B = 5.25 ?/? with a decreasing speed of 0.75 ?/?². At the instant shown, runner A is ?_A/C = 20 ? before the turn, and runner B is located at ? = 30 from the reference shown.