A 15 kg mass is accelerated from rest with a force of 100 N. As it moves faster, friction and air resistance create an oppositively directed retarding force given by FR = A + Bv, where A = 25 N and B = 0.5 N/m/s. At what velocity does the acceleration equal to one half of the initial acceleration?
(A) 25 ms–1
(B) 50 m/s
(C) 75 m/s
(D) 100 m/s
