A mysterious rocket-propelled object of mass 43.5 kg is initially at rest in the middle of the horizontal, frictionless surface of an ice-covered lake. Then a force directed east and with magnitude f(t) = (16.3 N/s) t is applied. What is the velocity of the object after 5 seconds?
A) 40.75 m/s
B) 81.5 m/s
C) 163 m/s
D) 407.5 m/s