A stationary 1.67-kg object is struck by a stick. The object experiences a horizontal force given by F = at bt^2, where t is the time in seconds from the instant the stick first contacts the object. If a = 1500 kN/s and b = 20,000 kN/s, what is the speed of the object just after it comes away from the stick at t = 2.74 ms? Give your answer in m/s but do not include the units your answer.